Tablica to grupa elementów podobnego typu, która ma ciągłą lokalizację w pamięci. Tablica to zbiór zmiennych o podobnym typie, które są określone wspólną nazwą.
W tym samouczku pokrótce dowiesz się, jak przechowywać wartość w tablicy w powszechnie używanych językach.
1. Język C
Wszystkie tablice stanowią ciągły blok lokalizacji pamięci. Domyślnie najniższa pozycja tablicy przechowuje pierwszy element, a najwyższa pozycja przechowuje ostatnie dane. W C tablicę deklaruje się poprzez określenie typu elementu i całkowitej długości tablicy wymaganej do przechowywania danych.
Składnia deklarowania tablicy
type arrayName [ arrSize ];
Składnia inicjowania w celu przechowywania wartości tablicowych
double balance[6] = {500.0, 52.0, 63.6, 77.80, 70.10, 80.12}; Przykład
#include int main () { int n[ 11 ]; /* declaring an array comprising of 11 integers */ int i,j; /* initialize elements of array n to 0 */ for ( i = 0; i <11; 100 i++ ) { n[ i ]="i" + 10; * storing or initializing the array at location with element } result of element's value for (j="0;" j < 11; j++ printf('element stored position [%d]="%d
'," j, n[j] ); return 0; pre> <p> <strong>Output</strong> </p> <pre> Element stored at position [0] = 10 Element stored at position [1] = 11 Element stored at position [2] = 12 Element stored at position [3] = 13 Element stored at position [4] = 14 Element stored at position [5] = 15 Element stored at position [6] = 16 Element stored at position [7] = 17 Element stored at position [8] = 18 Element stored at position [9] = 19 Element stored at position [10] = 20 </pre> <h3>Multidimensional Array in C</h3> <p>In C language, the elements of a 2 D (two-dimensional) array are accessed with the help of subscripts, i.e., the row index number and the column index number of the array.</p> <p> <strong>Syntax for declaring Array</strong> </p> <pre> int val = arr[x][y]; </pre> <p> <strong>Syntax for Initializing Two-Dimensional Arrays</strong> </p> <pre> int a[1][4] = { {4, 4, 2, 1} , /* initializers for row indexed by 0 */ {4, 5, 16, 10} , /* initializers for row indexed by 1 */ {8, 19, 10, 11} /* initializers for row indexed by 2 */ }; </pre> <p> <strong></strong> </p> <pre> #include int main () { /* declaring and initializing the array with 4 rows and 2 columns*/ int arr[4][2] = { {1,0}, {1,2}, {2,4}, {3,6}}; int i, j; /* output each array element's value */ for ( i = 0; i <4; i++ ) { for ( j="0;" < 2; j++ printf(' data stored in 2d array[%d][%d]="%d
'," i,j, arr[i][j] ); } return 0; pre> <p> <strong>Output</strong> </p> <pre> Data stored in 2D array[0][0] = 1 Data stored in 2D array[0][1] = 0 Data stored in 2D array[1][0] = 1 Data stored in 2D array[1][1] = 2 Data stored in 2D array[2][0] = 2 Data stored in 2D array[2][1] = 4 Data stored in 2D array[3][0] = 3 Data stored in 2D array[3][1] = 6 </pre> <h2>2. C++ Language</h2> <p>In C++ language the user needs to specify the element type and total length of array.</p> <p> <strong>Syntax to Declare Array</strong> </p> <pre> type arrName [ arrSize ]; </pre> <p> <strong>Syntax to initialize array</strong> </p> <pre> int arr[] = { 1, 2, 3, 4, 5 } </pre> <p> <strong>Example</strong> </p> <pre> #include using namespace std; int main () { // declaring an array with 4 rows. int arr[4] = {1,7,50,6}; // traversing the output for each array value for ( int i = 0; i <4; i++ ) { cout << 'array at position[' i ']: '; arr[i]<< endl; } return 0; < pre> <p> <strong>Output</strong> </p> <pre> array at position[0]: 1 array at position[1]: 7 array at position[2]: 50 array at position[3]: 6 </pre> <h3>Multidimensional Array</h3> <p>C++ language also enables the Multidimensional arrays.</p> <p> <strong>Syntax for initializing 2D array</strong> </p> <pre> int a[4][3] = { {0, 1, 2} , /* storing data in array for row indexed by 0 */ {42, 25, 62} , /* storing data in array for row indexed by 1 */ {18, 90, 15}, /* storing data in array for row indexed by 2 */ {21, 19, 25}, /* storing data in array for row indexed by 3 */ }; </pre> <p> <strong>Example</strong> </p> <pre> #include using namespace std; int main () { // declaring an array with 4 rows and 2 columns. int arr[4][2] = { {1,0}, {0,2}, {2,3}, {5,6}}; // traversing the output for each array value for ( int i = 0; i <4; i++ ) for ( int j="0;" < 2; j++ { cout << 'array at position[' i '][' ']: '; arr[i][j]<< endl; } return 0; pre> <p> <strong>Output</strong> </p> <pre> array at position[0][0]: 1 array at position[0][1]: 0 array at position[1][0]: 0 array at position[1][1]: 2 array at position[2][0]: 2 array at position[2][1]: 3 array at position[3][0]: 5 array at position[3][1]: 6 </pre> <h2>3. Java</h2> <p>In Java language, Arrays work differently than what they used to do in C or C++ language.</p> <h3>One-Dimensional Arrays:</h3> <p>To declare an array, the user needs to have two primary components: the type and the array's name.</p> <p>The 'Type' refers to the elementary type of a specific array. It determines the data type of all elements that are included in the array. It comprises the array of primitive data types, unlike integers, char, float, double, etc., or it could include the user-defined data types (objects of a class) as well. Therefore, the element type for the array concludes what kind of data the array will contain.</p> <p> <strong>Syntax</strong> </p> <pre> type arr_var_name[]; OR type[] arr_var_name; OR var-name = new type [size]; </pre> <p> <strong>Store values in one-dimensional array</strong> </p> <p>Assigning values to an element in an array is similar to assigning values to scalar variables.</p> <pre> Array [index]= initializers; arr[1]= 50 arr[2]= 20 </pre> <h4>NOTE: It the array element is not assigned any value, by default it has a Null (empty) value.</h4> <p> <strong>Example</strong> </p> <pre> //Java Program to demonstrate how to initialize, store and display //values in one-dimensional arrays. class Testarray{ public static void main(String args[]){ int arr[]=new int[5];//declaration and instantiation arr[0]=20;//initialization of the array arr[1]=40; arr[2]=60; arr[3]=80; arr[4]=100; //traversing array to print the array values for(int i=0;i <arr.length;i++) system.out.println(arr[i]); }} < pre> <p> <strong>Output</strong> </p> <pre> 20 40 60 80 100 </pre> <h3>Arrays of Objects</h3> <p>An array of objects is constructed in the same way as an array of primitive type data elements.</p> <p> <strong>Example</strong> </p> <pre> // Java program to create, store and display values for one-dimensional // array of objects class Employee { public int id_no; public String name; Employee(int id_no, String name) { this.id_no = id_no; this.name = name; } } // The Elements of the array are objects of a class Employee. public class Array_Objects_Example { public static void main (String[] args) { // declares an Array of integers. Employee[] arr; // assigning space for 5 objects of type Employee. arr = new Employee[5]; // storing the value for the first element of the array arr[0] = new Employee(111,'Varun'); // storing the value for the second elements of the array arr[1] = new Employee(121,'Sukla'); // so on... arr[2] = new Employee(131,'Virat'); arr[3] = new Employee(141,'Anuskha'); arr[4] = new Employee(151,'Mohit'); // accessing the elements of the specified array for (int i = 0; i <arr.length; i++) system.out.println('element at ' + i : arr[i].id_no +' '+ arr[i].name); } < pre> <p> <strong>Output</strong> </p> <pre> Element at 0 : 111 Varun Element at 1 : 121 Sukla Element at 2 : 131 Virat Element at 3 : 141 Anuskha Element at 4 : 151 Mohit </pre> <h3>Multidimensional Arrays</h3> <p>Multidimensional arrays are termed 'arrays of arrays' as they can hold each element of an array with the reference of another array. These are also known as Jagged Arrays. A multidimensional array is constructed by adding a set of square brackets ([]) per dimension.</p> <p> <strong>Syntax</strong> </p> <pre> int[][] intArray = new int[10][20]; //a 2D array or matrix int[][][] intArray = new int[10][20][10]; //a 3D array </pre> <p> <strong>Example to store values in a Multidimensional Array</strong> </p> <pre> arry[0][0]=10; arry[0][1]=20; arry[0][2]=30; arry[1][0]=40; arry[1][1]=50; arry[1][3]=60; arry[2][1]=70; arry[2][2]=80; arry[2][3]=90; </pre> <p> <strong>Example of Multidimensional Array</strong> </p> <pre> class multiDimensional_Example { public static void main(String args[]) { // declaring and storing data in 2-Dimensional array int arry[][] = { {12,17,19},{32,62,12},{37,34,32} }; // traversing and printing the 2-Dimensional array for (int i=0; i<3 3 ; i++) { for (int j="0;" < j++) system.out.print(arry[i][j] + ' '); system.out.println(); } pre> <p> <strong>Output</strong> </p> <pre> 12 17 19 32 62 12 37 34 32 </pre> <h2>4. PHP</h2> <p>PHP array is an ordered map (holds elements on the base of the key-value). It is utilized to hold multiple values of a similar data type in a single variable.</p> <p>PHP contains 3 kinds of array that are as follows:</p> <ol class="points"> <li>Indexed Array</li> <li>Associative Array</li> <li>Multidimensional Array</li> </ol> <h3>1. Indexed Array</h3> <p>PHP index is described by an integer number that begins with 0 (default value). The PHP array can store any data type, such as numbers, characters, strings, and objects. All PHP array data are allocated an index number by default.</p> <p> <strong>Syntax to store values</strong> </p> <pre> $Colour =array('Red', 'White', 'Black', 'Yellow'); </pre> <p> <strong>Or</strong> </p> <pre> $Colour[0]='Red '; $Colour[1]='White'; $Colour[2]='Black'; $Colour[3]='Yellow'; </pre> <p> <strong>Example</strong> </p> <pre> </pre> <p> <strong>Output</strong> </p> <pre> Colours are: Red, White, Black, Yellow </pre> <h3>2. Associative Array</h3> <p>In PHP, the user can associate any specific name with each array elements using the '=>' symbol.</p> <p> <strong>Syntax</strong> </p> <pre> $marks =array('Reema'=>'95','John'=>'45','Rahul'=>'20'); </pre> <p> <strong>Or</strong> </p> <pre> $marks['Reema ']='95'; $marks['John']='45'; $marks ['Rahul ']='20'; </pre> <p> <strong>Example</strong> </p> <pre> <?php $marks['Reema ']='95'; $marks['John']='45'; $marks ['Rahul ']='20'; echo 'Reema's Marks: '.$marks ['Reema '].' <br/>'; echo ' John's Marks: '.$marks['John'].' <br>'; echo ' Rahul's Marks: '.$marks ['Rahul '].' <br>'; ?> </pre> <p> <strong>Output</strong> </p> <pre> Reema's Marks: 95 John's Marks: 45 Rahul's Marks: 20 </pre> <h3>3. Multidimensional Array</h3> <p>Multidimensional arrays in PHP are also termed as 'array of arrays'. It enabled the user to store array data in a tabular format. PHP multidimensional array can be expressed in the form of a matrix which is denoted by row * column.</p> <p> <strong>Syntax</strong> </p> <pre> $emp = array ( array (1,'Reema',95), array(2,'john',45), array(3,'rahul',20) ); </pre> <p> <strong>Example</strong> </p> <pre> <?php $emp = array ( array (1,'Reema',95), array(2,'john',45), array(3,'rahul',20) ); for ($row = 0; $row < 3; $row++) { for ($col = 0; $col < 3; $col++) { echo $emp[$row][$col].' '; } echo ' <br/>'; } ?> </pre> <p> <strong>Output</strong> </p> <pre> 1 Reema 95 2 john 45 3 rahul 20 </pre> <h2>5. Python</h2> <p>Python uses a module named 'Array' to handle all the functions of Arrays in Python. It is helpful when the user wants to manipulate only particular data values. Given below are the keywords that are important to learn the concept of an array in Python:</p> <ul> <li>Element - Any data stored in an array is known an element.</li> <li>Index - Whenever an array stores any data, it has some numerical location known as index that is beneficial to identify the location of the element.</li> </ul> <p> <strong>Syntax</strong> </p> <pre> from array import * arrayName = array(typecode, [data_to_be_initialized]) </pre> <p> <strong>Example</strong> </p> <pre> import array as arry n = arry.array('i', [20, 40, 60, 80]) print('First array value:', n[0]) print('Second array value:', n[1]) print('Second last array value:', n[-1]) </pre> <p> <strong>Output</strong> </p> <pre> First array value: 20 Second array value: 40 Second last array value: 80 </pre> <hr></3></pre></arr.length;></pre></arr.length;i++)></pre></4;></pre></4;></pre></4;></pre></11;> Tablica wielowymiarowa w C
W języku C dostęp do elementów tablicy 2D (dwuwymiarowej) uzyskuje się za pomocą indeksów dolnych, tj. numeru indeksu wiersza i numeru indeksu kolumny tablicy.
Składnia deklarowania tablicy
int val = arr[x][y];
Składnia inicjowania tablic dwuwymiarowych
ciąg znaków Java.format
int a[1][4] = { {4, 4, 2, 1} , /* initializers for row indexed by 0 */ {4, 5, 16, 10} , /* initializers for row indexed by 1 */ {8, 19, 10, 11} /* initializers for row indexed by 2 */ };
#include int main () { /* declaring and initializing the array with 4 rows and 2 columns*/ int arr[4][2] = { {1,0}, {1,2}, {2,4}, {3,6}}; int i, j; /* output each array element's value */ for ( i = 0; i <4; i++ ) { for ( j="0;" < 2; j++ printf(\' data stored in 2d array[%d][%d]="%d
'," i,j, arr[i][j] ); } return 0; pre> <p> <strong>Output</strong> </p> <pre> Data stored in 2D array[0][0] = 1 Data stored in 2D array[0][1] = 0 Data stored in 2D array[1][0] = 1 Data stored in 2D array[1][1] = 2 Data stored in 2D array[2][0] = 2 Data stored in 2D array[2][1] = 4 Data stored in 2D array[3][0] = 3 Data stored in 2D array[3][1] = 6 </pre> <h2>2. C++ Language</h2> <p>In C++ language the user needs to specify the element type and total length of array.</p> <p> <strong>Syntax to Declare Array</strong> </p> <pre> type arrName [ arrSize ]; </pre> <p> <strong>Syntax to initialize array</strong> </p> <pre> int arr[] = { 1, 2, 3, 4, 5 } </pre> <p> <strong>Example</strong> </p> <pre> #include using namespace std; int main () { // declaring an array with 4 rows. int arr[4] = {1,7,50,6}; // traversing the output for each array value for ( int i = 0; i <4; i++ ) { cout << \'array at position[\' i \']: \'; arr[i]<< endl; } return 0; < pre> <p> <strong>Output</strong> </p> <pre> array at position[0]: 1 array at position[1]: 7 array at position[2]: 50 array at position[3]: 6 </pre> <h3>Multidimensional Array</h3> <p>C++ language also enables the Multidimensional arrays.</p> <p> <strong>Syntax for initializing 2D array</strong> </p> <pre> int a[4][3] = { {0, 1, 2} , /* storing data in array for row indexed by 0 */ {42, 25, 62} , /* storing data in array for row indexed by 1 */ {18, 90, 15}, /* storing data in array for row indexed by 2 */ {21, 19, 25}, /* storing data in array for row indexed by 3 */ }; </pre> <p> <strong>Example</strong> </p> <pre> #include using namespace std; int main () { // declaring an array with 4 rows and 2 columns. int arr[4][2] = { {1,0}, {0,2}, {2,3}, {5,6}}; // traversing the output for each array value for ( int i = 0; i <4; i++ ) for ( int j="0;" < 2; j++ { cout << \'array at position[\' i \'][\' \']: \'; arr[i][j]<< endl; } return 0; pre> <p> <strong>Output</strong> </p> <pre> array at position[0][0]: 1 array at position[0][1]: 0 array at position[1][0]: 0 array at position[1][1]: 2 array at position[2][0]: 2 array at position[2][1]: 3 array at position[3][0]: 5 array at position[3][1]: 6 </pre> <h2>3. Java</h2> <p>In Java language, Arrays work differently than what they used to do in C or C++ language.</p> <h3>One-Dimensional Arrays:</h3> <p>To declare an array, the user needs to have two primary components: the type and the array's name.</p> <p>The 'Type' refers to the elementary type of a specific array. It determines the data type of all elements that are included in the array. It comprises the array of primitive data types, unlike integers, char, float, double, etc., or it could include the user-defined data types (objects of a class) as well. Therefore, the element type for the array concludes what kind of data the array will contain.</p> <p> <strong>Syntax</strong> </p> <pre> type arr_var_name[]; OR type[] arr_var_name; OR var-name = new type [size]; </pre> <p> <strong>Store values in one-dimensional array</strong> </p> <p>Assigning values to an element in an array is similar to assigning values to scalar variables.</p> <pre> Array [index]= initializers; arr[1]= 50 arr[2]= 20 </pre> <h4>NOTE: It the array element is not assigned any value, by default it has a Null (empty) value.</h4> <p> <strong>Example</strong> </p> <pre> //Java Program to demonstrate how to initialize, store and display //values in one-dimensional arrays. class Testarray{ public static void main(String args[]){ int arr[]=new int[5];//declaration and instantiation arr[0]=20;//initialization of the array arr[1]=40; arr[2]=60; arr[3]=80; arr[4]=100; //traversing array to print the array values for(int i=0;i <arr.length;i++) system.out.println(arr[i]); }} < pre> <p> <strong>Output</strong> </p> <pre> 20 40 60 80 100 </pre> <h3>Arrays of Objects</h3> <p>An array of objects is constructed in the same way as an array of primitive type data elements.</p> <p> <strong>Example</strong> </p> <pre> // Java program to create, store and display values for one-dimensional // array of objects class Employee { public int id_no; public String name; Employee(int id_no, String name) { this.id_no = id_no; this.name = name; } } // The Elements of the array are objects of a class Employee. public class Array_Objects_Example { public static void main (String[] args) { // declares an Array of integers. Employee[] arr; // assigning space for 5 objects of type Employee. arr = new Employee[5]; // storing the value for the first element of the array arr[0] = new Employee(111,'Varun'); // storing the value for the second elements of the array arr[1] = new Employee(121,'Sukla'); // so on... arr[2] = new Employee(131,'Virat'); arr[3] = new Employee(141,'Anuskha'); arr[4] = new Employee(151,'Mohit'); // accessing the elements of the specified array for (int i = 0; i <arr.length; i++) system.out.println(\'element at \' + i : arr[i].id_no +\' \'+ arr[i].name); } < pre> <p> <strong>Output</strong> </p> <pre> Element at 0 : 111 Varun Element at 1 : 121 Sukla Element at 2 : 131 Virat Element at 3 : 141 Anuskha Element at 4 : 151 Mohit </pre> <h3>Multidimensional Arrays</h3> <p>Multidimensional arrays are termed 'arrays of arrays' as they can hold each element of an array with the reference of another array. These are also known as Jagged Arrays. A multidimensional array is constructed by adding a set of square brackets ([]) per dimension.</p> <p> <strong>Syntax</strong> </p> <pre> int[][] intArray = new int[10][20]; //a 2D array or matrix int[][][] intArray = new int[10][20][10]; //a 3D array </pre> <p> <strong>Example to store values in a Multidimensional Array</strong> </p> <pre> arry[0][0]=10; arry[0][1]=20; arry[0][2]=30; arry[1][0]=40; arry[1][1]=50; arry[1][3]=60; arry[2][1]=70; arry[2][2]=80; arry[2][3]=90; </pre> <p> <strong>Example of Multidimensional Array</strong> </p> <pre> class multiDimensional_Example { public static void main(String args[]) { // declaring and storing data in 2-Dimensional array int arry[][] = { {12,17,19},{32,62,12},{37,34,32} }; // traversing and printing the 2-Dimensional array for (int i=0; i<3 3 ; i++) { for (int j="0;" < j++) system.out.print(arry[i][j] + \' \'); system.out.println(); } pre> <p> <strong>Output</strong> </p> <pre> 12 17 19 32 62 12 37 34 32 </pre> <h2>4. PHP</h2> <p>PHP array is an ordered map (holds elements on the base of the key-value). It is utilized to hold multiple values of a similar data type in a single variable.</p> <p>PHP contains 3 kinds of array that are as follows:</p> <ol class="points"> <li>Indexed Array</li> <li>Associative Array</li> <li>Multidimensional Array</li> </ol> <h3>1. Indexed Array</h3> <p>PHP index is described by an integer number that begins with 0 (default value). The PHP array can store any data type, such as numbers, characters, strings, and objects. All PHP array data are allocated an index number by default.</p> <p> <strong>Syntax to store values</strong> </p> <pre> $Colour =array('Red', 'White', 'Black', 'Yellow'); </pre> <p> <strong>Or</strong> </p> <pre> $Colour[0]='Red '; $Colour[1]='White'; $Colour[2]='Black'; $Colour[3]='Yellow'; </pre> <p> <strong>Example</strong> </p> <pre> </pre> <p> <strong>Output</strong> </p> <pre> Colours are: Red, White, Black, Yellow </pre> <h3>2. Associative Array</h3> <p>In PHP, the user can associate any specific name with each array elements using the '=>' symbol.</p> <p> <strong>Syntax</strong> </p> <pre> $marks =array('Reema'=>'95','John'=>'45','Rahul'=>'20'); </pre> <p> <strong>Or</strong> </p> <pre> $marks['Reema ']='95'; $marks['John']='45'; $marks ['Rahul ']='20'; </pre> <p> <strong>Example</strong> </p> <pre> <?php $marks[\'Reema \']=\'95\'; $marks[\'John\']=\'45\'; $marks [\'Rahul \']=\'20\'; echo \'Reema\'s Marks: \'.$marks [\'Reema \'].\' <br/>'; echo ' John's Marks: '.$marks['John'].' <br>'; echo ' Rahul's Marks: '.$marks ['Rahul '].' <br>'; ?> </pre> <p> <strong>Output</strong> </p> <pre> Reema's Marks: 95 John's Marks: 45 Rahul's Marks: 20 </pre> <h3>3. Multidimensional Array</h3> <p>Multidimensional arrays in PHP are also termed as 'array of arrays'. It enabled the user to store array data in a tabular format. PHP multidimensional array can be expressed in the form of a matrix which is denoted by row * column.</p> <p> <strong>Syntax</strong> </p> <pre> $emp = array ( array (1,'Reema',95), array(2,'john',45), array(3,'rahul',20) ); </pre> <p> <strong>Example</strong> </p> <pre> <?php $emp = array ( array (1,\'Reema\',95), array(2,\'john\',45), array(3,\'rahul\',20) ); for ($row = 0; $row < 3; $row++) { for ($col = 0; $col < 3; $col++) { echo $emp[$row][$col].\' \'; } echo \' <br/>'; } ?> </pre> <p> <strong>Output</strong> </p> <pre> 1 Reema 95 2 john 45 3 rahul 20 </pre> <h2>5. Python</h2> <p>Python uses a module named 'Array' to handle all the functions of Arrays in Python. It is helpful when the user wants to manipulate only particular data values. Given below are the keywords that are important to learn the concept of an array in Python:</p> <ul> <li>Element - Any data stored in an array is known an element.</li> <li>Index - Whenever an array stores any data, it has some numerical location known as index that is beneficial to identify the location of the element.</li> </ul> <p> <strong>Syntax</strong> </p> <pre> from array import * arrayName = array(typecode, [data_to_be_initialized]) </pre> <p> <strong>Example</strong> </p> <pre> import array as arry n = arry.array('i', [20, 40, 60, 80]) print('First array value:', n[0]) print('Second array value:', n[1]) print('Second last array value:', n[-1]) </pre> <p> <strong>Output</strong> </p> <pre> First array value: 20 Second array value: 40 Second last array value: 80 </pre> <hr></3></pre></arr.length;></pre></arr.length;i++)></pre></4;></pre></4;></pre></4;> 2. Język C++
W języku C++ użytkownik musi określić typ elementu i całkowitą długość tablicy.
Składnia deklarowania tablicy
type arrName [ arrSize ];
Składnia inicjująca tablicę
int arr[] = { 1, 2, 3, 4, 5 } Przykład
#include using namespace std; int main () { // declaring an array with 4 rows. int arr[4] = {1,7,50,6}; // traversing the output for each array value for ( int i = 0; i <4; i++ ) { cout << \'array at position[\' i \']: \'; arr[i]<< endl; } return 0; < pre> <p> <strong>Output</strong> </p> <pre> array at position[0]: 1 array at position[1]: 7 array at position[2]: 50 array at position[3]: 6 </pre> <h3>Multidimensional Array</h3> <p>C++ language also enables the Multidimensional arrays.</p> <p> <strong>Syntax for initializing 2D array</strong> </p> <pre> int a[4][3] = { {0, 1, 2} , /* storing data in array for row indexed by 0 */ {42, 25, 62} , /* storing data in array for row indexed by 1 */ {18, 90, 15}, /* storing data in array for row indexed by 2 */ {21, 19, 25}, /* storing data in array for row indexed by 3 */ }; </pre> <p> <strong>Example</strong> </p> <pre> #include using namespace std; int main () { // declaring an array with 4 rows and 2 columns. int arr[4][2] = { {1,0}, {0,2}, {2,3}, {5,6}}; // traversing the output for each array value for ( int i = 0; i <4; i++ ) for ( int j="0;" < 2; j++ { cout << \'array at position[\' i \'][\' \']: \'; arr[i][j]<< endl; } return 0; pre> <p> <strong>Output</strong> </p> <pre> array at position[0][0]: 1 array at position[0][1]: 0 array at position[1][0]: 0 array at position[1][1]: 2 array at position[2][0]: 2 array at position[2][1]: 3 array at position[3][0]: 5 array at position[3][1]: 6 </pre> <h2>3. Java</h2> <p>In Java language, Arrays work differently than what they used to do in C or C++ language.</p> <h3>One-Dimensional Arrays:</h3> <p>To declare an array, the user needs to have two primary components: the type and the array's name.</p> <p>The 'Type' refers to the elementary type of a specific array. It determines the data type of all elements that are included in the array. It comprises the array of primitive data types, unlike integers, char, float, double, etc., or it could include the user-defined data types (objects of a class) as well. Therefore, the element type for the array concludes what kind of data the array will contain.</p> <p> <strong>Syntax</strong> </p> <pre> type arr_var_name[]; OR type[] arr_var_name; OR var-name = new type [size]; </pre> <p> <strong>Store values in one-dimensional array</strong> </p> <p>Assigning values to an element in an array is similar to assigning values to scalar variables.</p> <pre> Array [index]= initializers; arr[1]= 50 arr[2]= 20 </pre> <h4>NOTE: It the array element is not assigned any value, by default it has a Null (empty) value.</h4> <p> <strong>Example</strong> </p> <pre> //Java Program to demonstrate how to initialize, store and display //values in one-dimensional arrays. class Testarray{ public static void main(String args[]){ int arr[]=new int[5];//declaration and instantiation arr[0]=20;//initialization of the array arr[1]=40; arr[2]=60; arr[3]=80; arr[4]=100; //traversing array to print the array values for(int i=0;i <arr.length;i++) system.out.println(arr[i]); }} < pre> <p> <strong>Output</strong> </p> <pre> 20 40 60 80 100 </pre> <h3>Arrays of Objects</h3> <p>An array of objects is constructed in the same way as an array of primitive type data elements.</p> <p> <strong>Example</strong> </p> <pre> // Java program to create, store and display values for one-dimensional // array of objects class Employee { public int id_no; public String name; Employee(int id_no, String name) { this.id_no = id_no; this.name = name; } } // The Elements of the array are objects of a class Employee. public class Array_Objects_Example { public static void main (String[] args) { // declares an Array of integers. Employee[] arr; // assigning space for 5 objects of type Employee. arr = new Employee[5]; // storing the value for the first element of the array arr[0] = new Employee(111,'Varun'); // storing the value for the second elements of the array arr[1] = new Employee(121,'Sukla'); // so on... arr[2] = new Employee(131,'Virat'); arr[3] = new Employee(141,'Anuskha'); arr[4] = new Employee(151,'Mohit'); // accessing the elements of the specified array for (int i = 0; i <arr.length; i++) system.out.println(\'element at \' + i : arr[i].id_no +\' \'+ arr[i].name); } < pre> <p> <strong>Output</strong> </p> <pre> Element at 0 : 111 Varun Element at 1 : 121 Sukla Element at 2 : 131 Virat Element at 3 : 141 Anuskha Element at 4 : 151 Mohit </pre> <h3>Multidimensional Arrays</h3> <p>Multidimensional arrays are termed 'arrays of arrays' as they can hold each element of an array with the reference of another array. These are also known as Jagged Arrays. A multidimensional array is constructed by adding a set of square brackets ([]) per dimension.</p> <p> <strong>Syntax</strong> </p> <pre> int[][] intArray = new int[10][20]; //a 2D array or matrix int[][][] intArray = new int[10][20][10]; //a 3D array </pre> <p> <strong>Example to store values in a Multidimensional Array</strong> </p> <pre> arry[0][0]=10; arry[0][1]=20; arry[0][2]=30; arry[1][0]=40; arry[1][1]=50; arry[1][3]=60; arry[2][1]=70; arry[2][2]=80; arry[2][3]=90; </pre> <p> <strong>Example of Multidimensional Array</strong> </p> <pre> class multiDimensional_Example { public static void main(String args[]) { // declaring and storing data in 2-Dimensional array int arry[][] = { {12,17,19},{32,62,12},{37,34,32} }; // traversing and printing the 2-Dimensional array for (int i=0; i<3 3 ; i++) { for (int j="0;" < j++) system.out.print(arry[i][j] + \' \'); system.out.println(); } pre> <p> <strong>Output</strong> </p> <pre> 12 17 19 32 62 12 37 34 32 </pre> <h2>4. PHP</h2> <p>PHP array is an ordered map (holds elements on the base of the key-value). It is utilized to hold multiple values of a similar data type in a single variable.</p> <p>PHP contains 3 kinds of array that are as follows:</p> <ol class="points"> <li>Indexed Array</li> <li>Associative Array</li> <li>Multidimensional Array</li> </ol> <h3>1. Indexed Array</h3> <p>PHP index is described by an integer number that begins with 0 (default value). The PHP array can store any data type, such as numbers, characters, strings, and objects. All PHP array data are allocated an index number by default.</p> <p> <strong>Syntax to store values</strong> </p> <pre> $Colour =array('Red', 'White', 'Black', 'Yellow'); </pre> <p> <strong>Or</strong> </p> <pre> $Colour[0]='Red '; $Colour[1]='White'; $Colour[2]='Black'; $Colour[3]='Yellow'; </pre> <p> <strong>Example</strong> </p> <pre> </pre> <p> <strong>Output</strong> </p> <pre> Colours are: Red, White, Black, Yellow </pre> <h3>2. Associative Array</h3> <p>In PHP, the user can associate any specific name with each array elements using the '=>' symbol.</p> <p> <strong>Syntax</strong> </p> <pre> $marks =array('Reema'=>'95','John'=>'45','Rahul'=>'20'); </pre> <p> <strong>Or</strong> </p> <pre> $marks['Reema ']='95'; $marks['John']='45'; $marks ['Rahul ']='20'; </pre> <p> <strong>Example</strong> </p> <pre> <?php $marks[\'Reema \']=\'95\'; $marks[\'John\']=\'45\'; $marks [\'Rahul \']=\'20\'; echo \'Reema\'s Marks: \'.$marks [\'Reema \'].\' <br/>'; echo ' John's Marks: '.$marks['John'].' <br>'; echo ' Rahul's Marks: '.$marks ['Rahul '].' <br>'; ?> </pre> <p> <strong>Output</strong> </p> <pre> Reema's Marks: 95 John's Marks: 45 Rahul's Marks: 20 </pre> <h3>3. Multidimensional Array</h3> <p>Multidimensional arrays in PHP are also termed as 'array of arrays'. It enabled the user to store array data in a tabular format. PHP multidimensional array can be expressed in the form of a matrix which is denoted by row * column.</p> <p> <strong>Syntax</strong> </p> <pre> $emp = array ( array (1,'Reema',95), array(2,'john',45), array(3,'rahul',20) ); </pre> <p> <strong>Example</strong> </p> <pre> <?php $emp = array ( array (1,\'Reema\',95), array(2,\'john\',45), array(3,\'rahul\',20) ); for ($row = 0; $row < 3; $row++) { for ($col = 0; $col < 3; $col++) { echo $emp[$row][$col].\' \'; } echo \' <br/>'; } ?> </pre> <p> <strong>Output</strong> </p> <pre> 1 Reema 95 2 john 45 3 rahul 20 </pre> <h2>5. Python</h2> <p>Python uses a module named 'Array' to handle all the functions of Arrays in Python. It is helpful when the user wants to manipulate only particular data values. Given below are the keywords that are important to learn the concept of an array in Python:</p> <ul> <li>Element - Any data stored in an array is known an element.</li> <li>Index - Whenever an array stores any data, it has some numerical location known as index that is beneficial to identify the location of the element.</li> </ul> <p> <strong>Syntax</strong> </p> <pre> from array import * arrayName = array(typecode, [data_to_be_initialized]) </pre> <p> <strong>Example</strong> </p> <pre> import array as arry n = arry.array('i', [20, 40, 60, 80]) print('First array value:', n[0]) print('Second array value:', n[1]) print('Second last array value:', n[-1]) </pre> <p> <strong>Output</strong> </p> <pre> First array value: 20 Second array value: 40 Second last array value: 80 </pre> <hr></3></pre></arr.length;></pre></arr.length;i++)></pre></4;></pre></4;> Tablica wielowymiarowa
Język C++ umożliwia również tablice wielowymiarowe.
Składnia inicjowania tablicy 2D
int a[4][3] = { {0, 1, 2} , /* storing data in array for row indexed by 0 */ {42, 25, 62} , /* storing data in array for row indexed by 1 */ {18, 90, 15}, /* storing data in array for row indexed by 2 */ {21, 19, 25}, /* storing data in array for row indexed by 3 */ }; Przykład
#include using namespace std; int main () { // declaring an array with 4 rows and 2 columns. int arr[4][2] = { {1,0}, {0,2}, {2,3}, {5,6}}; // traversing the output for each array value for ( int i = 0; i <4; i++ ) for ( int j="0;" < 2; j++ { cout << \'array at position[\' i \'][\' \']: \'; arr[i][j]<< endl; } return 0; pre> <p> <strong>Output</strong> </p> <pre> array at position[0][0]: 1 array at position[0][1]: 0 array at position[1][0]: 0 array at position[1][1]: 2 array at position[2][0]: 2 array at position[2][1]: 3 array at position[3][0]: 5 array at position[3][1]: 6 </pre> <h2>3. Java</h2> <p>In Java language, Arrays work differently than what they used to do in C or C++ language.</p> <h3>One-Dimensional Arrays:</h3> <p>To declare an array, the user needs to have two primary components: the type and the array's name.</p> <p>The 'Type' refers to the elementary type of a specific array. It determines the data type of all elements that are included in the array. It comprises the array of primitive data types, unlike integers, char, float, double, etc., or it could include the user-defined data types (objects of a class) as well. Therefore, the element type for the array concludes what kind of data the array will contain.</p> <p> <strong>Syntax</strong> </p> <pre> type arr_var_name[]; OR type[] arr_var_name; OR var-name = new type [size]; </pre> <p> <strong>Store values in one-dimensional array</strong> </p> <p>Assigning values to an element in an array is similar to assigning values to scalar variables.</p> <pre> Array [index]= initializers; arr[1]= 50 arr[2]= 20 </pre> <h4>NOTE: It the array element is not assigned any value, by default it has a Null (empty) value.</h4> <p> <strong>Example</strong> </p> <pre> //Java Program to demonstrate how to initialize, store and display //values in one-dimensional arrays. class Testarray{ public static void main(String args[]){ int arr[]=new int[5];//declaration and instantiation arr[0]=20;//initialization of the array arr[1]=40; arr[2]=60; arr[3]=80; arr[4]=100; //traversing array to print the array values for(int i=0;i <arr.length;i++) system.out.println(arr[i]); }} < pre> <p> <strong>Output</strong> </p> <pre> 20 40 60 80 100 </pre> <h3>Arrays of Objects</h3> <p>An array of objects is constructed in the same way as an array of primitive type data elements.</p> <p> <strong>Example</strong> </p> <pre> // Java program to create, store and display values for one-dimensional // array of objects class Employee { public int id_no; public String name; Employee(int id_no, String name) { this.id_no = id_no; this.name = name; } } // The Elements of the array are objects of a class Employee. public class Array_Objects_Example { public static void main (String[] args) { // declares an Array of integers. Employee[] arr; // assigning space for 5 objects of type Employee. arr = new Employee[5]; // storing the value for the first element of the array arr[0] = new Employee(111,'Varun'); // storing the value for the second elements of the array arr[1] = new Employee(121,'Sukla'); // so on... arr[2] = new Employee(131,'Virat'); arr[3] = new Employee(141,'Anuskha'); arr[4] = new Employee(151,'Mohit'); // accessing the elements of the specified array for (int i = 0; i <arr.length; i++) system.out.println(\'element at \' + i : arr[i].id_no +\' \'+ arr[i].name); } < pre> <p> <strong>Output</strong> </p> <pre> Element at 0 : 111 Varun Element at 1 : 121 Sukla Element at 2 : 131 Virat Element at 3 : 141 Anuskha Element at 4 : 151 Mohit </pre> <h3>Multidimensional Arrays</h3> <p>Multidimensional arrays are termed 'arrays of arrays' as they can hold each element of an array with the reference of another array. These are also known as Jagged Arrays. A multidimensional array is constructed by adding a set of square brackets ([]) per dimension.</p> <p> <strong>Syntax</strong> </p> <pre> int[][] intArray = new int[10][20]; //a 2D array or matrix int[][][] intArray = new int[10][20][10]; //a 3D array </pre> <p> <strong>Example to store values in a Multidimensional Array</strong> </p> <pre> arry[0][0]=10; arry[0][1]=20; arry[0][2]=30; arry[1][0]=40; arry[1][1]=50; arry[1][3]=60; arry[2][1]=70; arry[2][2]=80; arry[2][3]=90; </pre> <p> <strong>Example of Multidimensional Array</strong> </p> <pre> class multiDimensional_Example { public static void main(String args[]) { // declaring and storing data in 2-Dimensional array int arry[][] = { {12,17,19},{32,62,12},{37,34,32} }; // traversing and printing the 2-Dimensional array for (int i=0; i<3 3 ; i++) { for (int j="0;" < j++) system.out.print(arry[i][j] + \' \'); system.out.println(); } pre> <p> <strong>Output</strong> </p> <pre> 12 17 19 32 62 12 37 34 32 </pre> <h2>4. PHP</h2> <p>PHP array is an ordered map (holds elements on the base of the key-value). It is utilized to hold multiple values of a similar data type in a single variable.</p> <p>PHP contains 3 kinds of array that are as follows:</p> <ol class="points"> <li>Indexed Array</li> <li>Associative Array</li> <li>Multidimensional Array</li> </ol> <h3>1. Indexed Array</h3> <p>PHP index is described by an integer number that begins with 0 (default value). The PHP array can store any data type, such as numbers, characters, strings, and objects. All PHP array data are allocated an index number by default.</p> <p> <strong>Syntax to store values</strong> </p> <pre> $Colour =array('Red', 'White', 'Black', 'Yellow'); </pre> <p> <strong>Or</strong> </p> <pre> $Colour[0]='Red '; $Colour[1]='White'; $Colour[2]='Black'; $Colour[3]='Yellow'; </pre> <p> <strong>Example</strong> </p> <pre> </pre> <p> <strong>Output</strong> </p> <pre> Colours are: Red, White, Black, Yellow </pre> <h3>2. Associative Array</h3> <p>In PHP, the user can associate any specific name with each array elements using the '=>' symbol.</p> <p> <strong>Syntax</strong> </p> <pre> $marks =array('Reema'=>'95','John'=>'45','Rahul'=>'20'); </pre> <p> <strong>Or</strong> </p> <pre> $marks['Reema ']='95'; $marks['John']='45'; $marks ['Rahul ']='20'; </pre> <p> <strong>Example</strong> </p> <pre> <?php $marks[\'Reema \']=\'95\'; $marks[\'John\']=\'45\'; $marks [\'Rahul \']=\'20\'; echo \'Reema\'s Marks: \'.$marks [\'Reema \'].\' <br/>'; echo ' John's Marks: '.$marks['John'].' <br>'; echo ' Rahul's Marks: '.$marks ['Rahul '].' <br>'; ?> </pre> <p> <strong>Output</strong> </p> <pre> Reema's Marks: 95 John's Marks: 45 Rahul's Marks: 20 </pre> <h3>3. Multidimensional Array</h3> <p>Multidimensional arrays in PHP are also termed as 'array of arrays'. It enabled the user to store array data in a tabular format. PHP multidimensional array can be expressed in the form of a matrix which is denoted by row * column.</p> <p> <strong>Syntax</strong> </p> <pre> $emp = array ( array (1,'Reema',95), array(2,'john',45), array(3,'rahul',20) ); </pre> <p> <strong>Example</strong> </p> <pre> <?php $emp = array ( array (1,\'Reema\',95), array(2,\'john\',45), array(3,\'rahul\',20) ); for ($row = 0; $row < 3; $row++) { for ($col = 0; $col < 3; $col++) { echo $emp[$row][$col].\' \'; } echo \' <br/>'; } ?> </pre> <p> <strong>Output</strong> </p> <pre> 1 Reema 95 2 john 45 3 rahul 20 </pre> <h2>5. Python</h2> <p>Python uses a module named 'Array' to handle all the functions of Arrays in Python. It is helpful when the user wants to manipulate only particular data values. Given below are the keywords that are important to learn the concept of an array in Python:</p> <ul> <li>Element - Any data stored in an array is known an element.</li> <li>Index - Whenever an array stores any data, it has some numerical location known as index that is beneficial to identify the location of the element.</li> </ul> <p> <strong>Syntax</strong> </p> <pre> from array import * arrayName = array(typecode, [data_to_be_initialized]) </pre> <p> <strong>Example</strong> </p> <pre> import array as arry n = arry.array('i', [20, 40, 60, 80]) print('First array value:', n[0]) print('Second array value:', n[1]) print('Second last array value:', n[-1]) </pre> <p> <strong>Output</strong> </p> <pre> First array value: 20 Second array value: 40 Second last array value: 80 </pre> <hr></3></pre></arr.length;></pre></arr.length;i++)></pre></4;> 3. Jawa
W języku Java tablice działają inaczej niż w językach C i C++.
Tablice jednowymiarowe:
Aby zadeklarować tablicę, użytkownik musi mieć dwa podstawowe komponenty: typ i nazwę tablicy.
„Typ” odnosi się do podstawowego typu określonej tablicy. Określa typ danych wszystkich elementów znajdujących się w tablicy. Zawiera tablicę prymitywnych typów danych, w przeciwieństwie do liczb całkowitych, char, float, double itp., ale może również zawierać typy danych zdefiniowane przez użytkownika (obiekty klasy). Dlatego typ elementu tablicy określa, jaki rodzaj danych będzie zawierać tablica.
rdbm
Składnia
type arr_var_name[]; OR type[] arr_var_name; OR var-name = new type [size];
Przechowuj wartości w tablicy jednowymiarowej
Przypisywanie wartości do elementu tablicy jest podobne do przypisywania wartości do zmiennych skalarnych.
Array [index]= initializers; arr[1]= 50 arr[2]= 20
UWAGA: Jeśli element tablicy nie ma przypisanej żadnej wartości, domyślnie ma wartość Null (pustą).
Przykład
//Java Program to demonstrate how to initialize, store and display //values in one-dimensional arrays. class Testarray{ public static void main(String args[]){ int arr[]=new int[5];//declaration and instantiation arr[0]=20;//initialization of the array arr[1]=40; arr[2]=60; arr[3]=80; arr[4]=100; //traversing array to print the array values for(int i=0;i <arr.length;i++) system.out.println(arr[i]); }} < pre> <p> <strong>Output</strong> </p> <pre> 20 40 60 80 100 </pre> <h3>Arrays of Objects</h3> <p>An array of objects is constructed in the same way as an array of primitive type data elements.</p> <p> <strong>Example</strong> </p> <pre> // Java program to create, store and display values for one-dimensional // array of objects class Employee { public int id_no; public String name; Employee(int id_no, String name) { this.id_no = id_no; this.name = name; } } // The Elements of the array are objects of a class Employee. public class Array_Objects_Example { public static void main (String[] args) { // declares an Array of integers. Employee[] arr; // assigning space for 5 objects of type Employee. arr = new Employee[5]; // storing the value for the first element of the array arr[0] = new Employee(111,'Varun'); // storing the value for the second elements of the array arr[1] = new Employee(121,'Sukla'); // so on... arr[2] = new Employee(131,'Virat'); arr[3] = new Employee(141,'Anuskha'); arr[4] = new Employee(151,'Mohit'); // accessing the elements of the specified array for (int i = 0; i <arr.length; i++) system.out.println(\'element at \' + i : arr[i].id_no +\' \'+ arr[i].name); } < pre> <p> <strong>Output</strong> </p> <pre> Element at 0 : 111 Varun Element at 1 : 121 Sukla Element at 2 : 131 Virat Element at 3 : 141 Anuskha Element at 4 : 151 Mohit </pre> <h3>Multidimensional Arrays</h3> <p>Multidimensional arrays are termed 'arrays of arrays' as they can hold each element of an array with the reference of another array. These are also known as Jagged Arrays. A multidimensional array is constructed by adding a set of square brackets ([]) per dimension.</p> <p> <strong>Syntax</strong> </p> <pre> int[][] intArray = new int[10][20]; //a 2D array or matrix int[][][] intArray = new int[10][20][10]; //a 3D array </pre> <p> <strong>Example to store values in a Multidimensional Array</strong> </p> <pre> arry[0][0]=10; arry[0][1]=20; arry[0][2]=30; arry[1][0]=40; arry[1][1]=50; arry[1][3]=60; arry[2][1]=70; arry[2][2]=80; arry[2][3]=90; </pre> <p> <strong>Example of Multidimensional Array</strong> </p> <pre> class multiDimensional_Example { public static void main(String args[]) { // declaring and storing data in 2-Dimensional array int arry[][] = { {12,17,19},{32,62,12},{37,34,32} }; // traversing and printing the 2-Dimensional array for (int i=0; i<3 3 ; i++) { for (int j="0;" < j++) system.out.print(arry[i][j] + \' \'); system.out.println(); } pre> <p> <strong>Output</strong> </p> <pre> 12 17 19 32 62 12 37 34 32 </pre> <h2>4. PHP</h2> <p>PHP array is an ordered map (holds elements on the base of the key-value). It is utilized to hold multiple values of a similar data type in a single variable.</p> <p>PHP contains 3 kinds of array that are as follows:</p> <ol class="points"> <li>Indexed Array</li> <li>Associative Array</li> <li>Multidimensional Array</li> </ol> <h3>1. Indexed Array</h3> <p>PHP index is described by an integer number that begins with 0 (default value). The PHP array can store any data type, such as numbers, characters, strings, and objects. All PHP array data are allocated an index number by default.</p> <p> <strong>Syntax to store values</strong> </p> <pre> $Colour =array('Red', 'White', 'Black', 'Yellow'); </pre> <p> <strong>Or</strong> </p> <pre> $Colour[0]='Red '; $Colour[1]='White'; $Colour[2]='Black'; $Colour[3]='Yellow'; </pre> <p> <strong>Example</strong> </p> <pre> </pre> <p> <strong>Output</strong> </p> <pre> Colours are: Red, White, Black, Yellow </pre> <h3>2. Associative Array</h3> <p>In PHP, the user can associate any specific name with each array elements using the '=>' symbol.</p> <p> <strong>Syntax</strong> </p> <pre> $marks =array('Reema'=>'95','John'=>'45','Rahul'=>'20'); </pre> <p> <strong>Or</strong> </p> <pre> $marks['Reema ']='95'; $marks['John']='45'; $marks ['Rahul ']='20'; </pre> <p> <strong>Example</strong> </p> <pre> <?php $marks[\'Reema \']=\'95\'; $marks[\'John\']=\'45\'; $marks [\'Rahul \']=\'20\'; echo \'Reema\'s Marks: \'.$marks [\'Reema \'].\' <br/>'; echo ' John's Marks: '.$marks['John'].' <br>'; echo ' Rahul's Marks: '.$marks ['Rahul '].' <br>'; ?> </pre> <p> <strong>Output</strong> </p> <pre> Reema's Marks: 95 John's Marks: 45 Rahul's Marks: 20 </pre> <h3>3. Multidimensional Array</h3> <p>Multidimensional arrays in PHP are also termed as 'array of arrays'. It enabled the user to store array data in a tabular format. PHP multidimensional array can be expressed in the form of a matrix which is denoted by row * column.</p> <p> <strong>Syntax</strong> </p> <pre> $emp = array ( array (1,'Reema',95), array(2,'john',45), array(3,'rahul',20) ); </pre> <p> <strong>Example</strong> </p> <pre> <?php $emp = array ( array (1,\'Reema\',95), array(2,\'john\',45), array(3,\'rahul\',20) ); for ($row = 0; $row < 3; $row++) { for ($col = 0; $col < 3; $col++) { echo $emp[$row][$col].\' \'; } echo \' <br/>'; } ?> </pre> <p> <strong>Output</strong> </p> <pre> 1 Reema 95 2 john 45 3 rahul 20 </pre> <h2>5. Python</h2> <p>Python uses a module named 'Array' to handle all the functions of Arrays in Python. It is helpful when the user wants to manipulate only particular data values. Given below are the keywords that are important to learn the concept of an array in Python:</p> <ul> <li>Element - Any data stored in an array is known an element.</li> <li>Index - Whenever an array stores any data, it has some numerical location known as index that is beneficial to identify the location of the element.</li> </ul> <p> <strong>Syntax</strong> </p> <pre> from array import * arrayName = array(typecode, [data_to_be_initialized]) </pre> <p> <strong>Example</strong> </p> <pre> import array as arry n = arry.array('i', [20, 40, 60, 80]) print('First array value:', n[0]) print('Second array value:', n[1]) print('Second last array value:', n[-1]) </pre> <p> <strong>Output</strong> </p> <pre> First array value: 20 Second array value: 40 Second last array value: 80 </pre> <hr></3></pre></arr.length;></pre></arr.length;i++)> Tablice obiektów
Tablica obiektów jest konstruowana w taki sam sposób, jak tablica elementów danych typu pierwotnego.
Przykład
// Java program to create, store and display values for one-dimensional // array of objects class Employee { public int id_no; public String name; Employee(int id_no, String name) { this.id_no = id_no; this.name = name; } } // The Elements of the array are objects of a class Employee. public class Array_Objects_Example { public static void main (String[] args) { // declares an Array of integers. Employee[] arr; // assigning space for 5 objects of type Employee. arr = new Employee[5]; // storing the value for the first element of the array arr[0] = new Employee(111,'Varun'); // storing the value for the second elements of the array arr[1] = new Employee(121,'Sukla'); // so on... arr[2] = new Employee(131,'Virat'); arr[3] = new Employee(141,'Anuskha'); arr[4] = new Employee(151,'Mohit'); // accessing the elements of the specified array for (int i = 0; i <arr.length; i++) system.out.println(\\'element at \\' + i : arr[i].id_no +\\' \\'+ arr[i].name); } < pre> <p> <strong>Output</strong> </p> <pre> Element at 0 : 111 Varun Element at 1 : 121 Sukla Element at 2 : 131 Virat Element at 3 : 141 Anuskha Element at 4 : 151 Mohit </pre> <h3>Multidimensional Arrays</h3> <p>Multidimensional arrays are termed 'arrays of arrays' as they can hold each element of an array with the reference of another array. These are also known as Jagged Arrays. A multidimensional array is constructed by adding a set of square brackets ([]) per dimension.</p> <p> <strong>Syntax</strong> </p> <pre> int[][] intArray = new int[10][20]; //a 2D array or matrix int[][][] intArray = new int[10][20][10]; //a 3D array </pre> <p> <strong>Example to store values in a Multidimensional Array</strong> </p> <pre> arry[0][0]=10; arry[0][1]=20; arry[0][2]=30; arry[1][0]=40; arry[1][1]=50; arry[1][3]=60; arry[2][1]=70; arry[2][2]=80; arry[2][3]=90; </pre> <p> <strong>Example of Multidimensional Array</strong> </p> <pre> class multiDimensional_Example { public static void main(String args[]) { // declaring and storing data in 2-Dimensional array int arry[][] = { {12,17,19},{32,62,12},{37,34,32} }; // traversing and printing the 2-Dimensional array for (int i=0; i<3 3 ; i++) { for (int j="0;" < j++) system.out.print(arry[i][j] + \\' \\'); system.out.println(); } pre> <p> <strong>Output</strong> </p> <pre> 12 17 19 32 62 12 37 34 32 </pre> <h2>4. PHP</h2> <p>PHP array is an ordered map (holds elements on the base of the key-value). It is utilized to hold multiple values of a similar data type in a single variable.</p> <p>PHP contains 3 kinds of array that are as follows:</p> <ol class="points"> <li>Indexed Array</li> <li>Associative Array</li> <li>Multidimensional Array</li> </ol> <h3>1. Indexed Array</h3> <p>PHP index is described by an integer number that begins with 0 (default value). The PHP array can store any data type, such as numbers, characters, strings, and objects. All PHP array data are allocated an index number by default.</p> <p> <strong>Syntax to store values</strong> </p> <pre> $Colour =array('Red', 'White', 'Black', 'Yellow'); </pre> <p> <strong>Or</strong> </p> <pre> $Colour[0]='Red '; $Colour[1]='White'; $Colour[2]='Black'; $Colour[3]='Yellow'; </pre> <p> <strong>Example</strong> </p> <pre> </pre> <p> <strong>Output</strong> </p> <pre> Colours are: Red, White, Black, Yellow </pre> <h3>2. Associative Array</h3> <p>In PHP, the user can associate any specific name with each array elements using the '=>' symbol.</p> <p> <strong>Syntax</strong> </p> <pre> $marks =array('Reema'=>'95','John'=>'45','Rahul'=>'20'); </pre> <p> <strong>Or</strong> </p> <pre> $marks['Reema ']='95'; $marks['John']='45'; $marks ['Rahul ']='20'; </pre> <p> <strong>Example</strong> </p> <pre> <?php $marks[\\'Reema \\']=\\'95\\'; $marks[\\'John\\']=\\'45\\'; $marks [\\'Rahul \\']=\\'20\\'; echo \\'Reema\\'s Marks: \\'.$marks [\\'Reema \\'].\\' <br/>'; echo ' John's Marks: '.$marks['John'].' <br>'; echo ' Rahul's Marks: '.$marks ['Rahul '].' <br>'; ?> </pre> <p> <strong>Output</strong> </p> <pre> Reema's Marks: 95 John's Marks: 45 Rahul's Marks: 20 </pre> <h3>3. Multidimensional Array</h3> <p>Multidimensional arrays in PHP are also termed as 'array of arrays'. It enabled the user to store array data in a tabular format. PHP multidimensional array can be expressed in the form of a matrix which is denoted by row * column.</p> <p> <strong>Syntax</strong> </p> <pre> $emp = array ( array (1,'Reema',95), array(2,'john',45), array(3,'rahul',20) ); </pre> <p> <strong>Example</strong> </p> <pre> <?php $emp = array ( array (1,\\'Reema\\',95), array(2,\\'john\\',45), array(3,\\'rahul\\',20) ); for ($row = 0; $row < 3; $row++) { for ($col = 0; $col < 3; $col++) { echo $emp[$row][$col].\\' \\'; } echo \\' <br/>'; } ?> </pre> <p> <strong>Output</strong> </p> <pre> 1 Reema 95 2 john 45 3 rahul 20 </pre> <h2>5. Python</h2> <p>Python uses a module named 'Array' to handle all the functions of Arrays in Python. It is helpful when the user wants to manipulate only particular data values. Given below are the keywords that are important to learn the concept of an array in Python:</p> <ul> <li>Element - Any data stored in an array is known an element.</li> <li>Index - Whenever an array stores any data, it has some numerical location known as index that is beneficial to identify the location of the element.</li> </ul> <p> <strong>Syntax</strong> </p> <pre> from array import * arrayName = array(typecode, [data_to_be_initialized]) </pre> <p> <strong>Example</strong> </p> <pre> import array as arry n = arry.array('i', [20, 40, 60, 80]) print('First array value:', n[0]) print('Second array value:', n[1]) print('Second last array value:', n[-1]) </pre> <p> <strong>Output</strong> </p> <pre> First array value: 20 Second array value: 40 Second last array value: 80 </pre> <hr></3></pre></arr.length;> Tablice wielowymiarowe
Tablice wielowymiarowe nazywane są „tablicami tablic”, ponieważ mogą zawierać każdy element tablicy z odniesieniem do innej tablicy. Są one również znane jako tablice postrzępione. Tablicę wielowymiarową konstruuje się poprzez dodanie zestawu nawiasów kwadratowych ([]) dla każdego wymiaru.
Zmień kolor w Gimpie
Składnia
int[][] intArray = new int[10][20]; //a 2D array or matrix int[][][] intArray = new int[10][20][10]; //a 3D array
Przykład przechowywania wartości w tablicy wielowymiarowej
arry[0][0]=10; arry[0][1]=20; arry[0][2]=30; arry[1][0]=40; arry[1][1]=50; arry[1][3]=60; arry[2][1]=70; arry[2][2]=80; arry[2][3]=90;
Przykład tablicy wielowymiarowej
class multiDimensional_Example { public static void main(String args[]) { // declaring and storing data in 2-Dimensional array int arry[][] = { {12,17,19},{32,62,12},{37,34,32} }; // traversing and printing the 2-Dimensional array for (int i=0; i<3 3 ; i++) { for (int j="0;" < j++) system.out.print(arry[i][j] + \\' \\'); system.out.println(); } pre> <p> <strong>Output</strong> </p> <pre> 12 17 19 32 62 12 37 34 32 </pre> <h2>4. PHP</h2> <p>PHP array is an ordered map (holds elements on the base of the key-value). It is utilized to hold multiple values of a similar data type in a single variable.</p> <p>PHP contains 3 kinds of array that are as follows:</p> <ol class="points"> <li>Indexed Array</li> <li>Associative Array</li> <li>Multidimensional Array</li> </ol> <h3>1. Indexed Array</h3> <p>PHP index is described by an integer number that begins with 0 (default value). The PHP array can store any data type, such as numbers, characters, strings, and objects. All PHP array data are allocated an index number by default.</p> <p> <strong>Syntax to store values</strong> </p> <pre> $Colour =array('Red', 'White', 'Black', 'Yellow'); </pre> <p> <strong>Or</strong> </p> <pre> $Colour[0]='Red '; $Colour[1]='White'; $Colour[2]='Black'; $Colour[3]='Yellow'; </pre> <p> <strong>Example</strong> </p> <pre> </pre> <p> <strong>Output</strong> </p> <pre> Colours are: Red, White, Black, Yellow </pre> <h3>2. Associative Array</h3> <p>In PHP, the user can associate any specific name with each array elements using the '=>' symbol.</p> <p> <strong>Syntax</strong> </p> <pre> $marks =array('Reema'=>'95','John'=>'45','Rahul'=>'20'); </pre> <p> <strong>Or</strong> </p> <pre> $marks['Reema ']='95'; $marks['John']='45'; $marks ['Rahul ']='20'; </pre> <p> <strong>Example</strong> </p> <pre> <?php $marks[\\'Reema \\']=\\'95\\'; $marks[\\'John\\']=\\'45\\'; $marks [\\'Rahul \\']=\\'20\\'; echo \\'Reema\\'s Marks: \\'.$marks [\\'Reema \\'].\\' <br/>'; echo ' John's Marks: '.$marks['John'].' <br>'; echo ' Rahul's Marks: '.$marks ['Rahul '].' <br>'; ?> </pre> <p> <strong>Output</strong> </p> <pre> Reema's Marks: 95 John's Marks: 45 Rahul's Marks: 20 </pre> <h3>3. Multidimensional Array</h3> <p>Multidimensional arrays in PHP are also termed as 'array of arrays'. It enabled the user to store array data in a tabular format. PHP multidimensional array can be expressed in the form of a matrix which is denoted by row * column.</p> <p> <strong>Syntax</strong> </p> <pre> $emp = array ( array (1,'Reema',95), array(2,'john',45), array(3,'rahul',20) ); </pre> <p> <strong>Example</strong> </p> <pre> <?php $emp = array ( array (1,\\'Reema\\',95), array(2,\\'john\\',45), array(3,\\'rahul\\',20) ); for ($row = 0; $row < 3; $row++) { for ($col = 0; $col < 3; $col++) { echo $emp[$row][$col].\\' \\'; } echo \\' <br/>'; } ?> </pre> <p> <strong>Output</strong> </p> <pre> 1 Reema 95 2 john 45 3 rahul 20 </pre> <h2>5. Python</h2> <p>Python uses a module named 'Array' to handle all the functions of Arrays in Python. It is helpful when the user wants to manipulate only particular data values. Given below are the keywords that are important to learn the concept of an array in Python:</p> <ul> <li>Element - Any data stored in an array is known an element.</li> <li>Index - Whenever an array stores any data, it has some numerical location known as index that is beneficial to identify the location of the element.</li> </ul> <p> <strong>Syntax</strong> </p> <pre> from array import * arrayName = array(typecode, [data_to_be_initialized]) </pre> <p> <strong>Example</strong> </p> <pre> import array as arry n = arry.array('i', [20, 40, 60, 80]) print('First array value:', n[0]) print('Second array value:', n[1]) print('Second last array value:', n[-1]) </pre> <p> <strong>Output</strong> </p> <pre> First array value: 20 Second array value: 40 Second last array value: 80 </pre> <hr></3> 4. PHP
Tablica PHP jest uporządkowaną mapą (zawiera elementy na podstawie pary klucz-wartość). Służy do przechowywania wielu wartości podobnego typu danych w jednej zmiennej.
PHP zawiera 3 rodzaje tablic, które są następujące:
- Indeksowana tablica
- Tablica asocjacyjna
- Tablica wielowymiarowa
1. Tablica indeksowana
Indeks PHP jest opisywany liczbą całkowitą zaczynającą się od 0 (wartość domyślna). Tablica PHP może przechowywać dane dowolnego typu, takie jak liczby, znaki, ciągi znaków i obiekty. Domyślnie wszystkim danym tablicowym PHP przypisany jest numer indeksu.
Składnia do przechowywania wartości
$Colour =array('Red', 'White', 'Black', 'Yellow');
Lub
$Colour[0]='Red '; $Colour[1]='White'; $Colour[2]='Black'; $Colour[3]='Yellow';
Przykład
Wyjście
Colours are: Red, White, Black, Yellow
2. Tablica asocjacyjna
W PHP użytkownik może powiązać dowolną nazwę z każdym elementem tablicy za pomocą symbolu „=>”.
Składnia
$marks =array('Reema'=>'95','John'=>'45','Rahul'=>'20');
Lub
$marks['Reema ']='95'; $marks['John']='45'; $marks ['Rahul ']='20';
Przykład
program Java
<?php $marks[\\'Reema \\']=\\'95\\'; $marks[\\'John\\']=\\'45\\'; $marks [\\'Rahul \\']=\\'20\\'; echo \\'Reema\\'s Marks: \\'.$marks [\\'Reema \\'].\\' <br/>'; echo ' John's Marks: '.$marks['John'].' <br>'; echo ' Rahul's Marks: '.$marks ['Rahul '].' <br>'; ?>
Wyjście
Reema's Marks: 95 John's Marks: 45 Rahul's Marks: 20
3. Tablica wielowymiarowa
Tablice wielowymiarowe w PHP nazywane są także „tablicami tablic”. Umożliwiło użytkownikowi przechowywanie danych tablicowych w formacie tabelarycznym. Wielowymiarową tablicę PHP można wyrazić w postaci macierzy, która jest oznaczona wierszem * kolumną.
Składnia
$emp = array ( array (1,'Reema',95), array(2,'john',45), array(3,'rahul',20) );
Przykład
<?php $emp = array ( array (1,\\'Reema\\',95), array(2,\\'john\\',45), array(3,\\'rahul\\',20) ); for ($row = 0; $row < 3; $row++) { for ($col = 0; $col < 3; $col++) { echo $emp[$row][$col].\\' \\'; } echo \\' <br/>'; } ?> Wyjście
1 Reema 95 2 john 45 3 rahul 20
5. Pyton
Python używa modułu o nazwie „Array” do obsługi wszystkich funkcji Arrays w Pythonie. Jest to pomocne, gdy użytkownik chce manipulować tylko określonymi wartościami danych. Poniżej podano słowa kluczowe ważne do poznania koncepcji tablicy w Pythonie:
- Element – wszelkie dane przechowywane w tablicy nazywane są elementami.
- Indeks — ilekroć tablica przechowuje jakiekolwiek dane, ma pewną numeryczną lokalizację zwaną indeksem, która jest korzystna do zidentyfikowania lokalizacji elementu.
Składnia
from array import * arrayName = array(typecode, [data_to_be_initialized])
Przykład
import array as arry n = arry.array('i', [20, 40, 60, 80]) print('First array value:', n[0]) print('Second array value:', n[1]) print('Second last array value:', n[-1])
Wyjście
First array value: 20 Second array value: 40 Second last array value: 80