2-D Array In C

2-D Array in C Programming Language

In this post, We will learn about the 2-D array in c programming language.

Array In C  

An array of arrays is known as a 2D array.

Declare Two-Dimension Array in C

In C program we declare a 2-D array same as an array just at the end we mention the number of the column element we want to store in the array.
Syntax to declare a 2-D array

data_type array_name[number_of_row element][number_of_column_element];

Example: Declare a 2-D array having 2 row and 2 columns

int my_integer_array[2][2];

Initialize an Array in C

We can initialize an array of the array by putting values in the curly bracket.

Example: Declare an array of array with 3 rows and 4 columns and initialize it.

 int my_integer_array[3][4] = {  
                               {8, 6, 5, 4},  
                               {2, 1, 9, 7},  
                               {3, 6, 4, 2}  
                             };  

Access Elements of a Two-Dimension Array in C

We can access a 2-D array element using row and column index

printf("%d", my_integer_array[0][0]); // output 8

Output: 8

Example: Take a 2-D array input from the user and display it.

 #include<stdio.h>   
 int main()   
 {   
      int row, col, i, j;  
      printf("Enter number of row: ");  
      scanf("%d", &row);  
      printf("Enter number of column: ");  
      scanf("%d", &col);  
      int arr[row][col];  
      for (i=0; i<row; i++) {  
           for(j=0; j<col; j++) {  
                int num;  
                printf("Enter %dth row and %dth col value:", i, j);  
                scanf("%d", &num);  
                arr[i][j] = num;  
           }  
       }  
      printf("output array\n");  
      for(i=0; i<row; i++) {  
           for (j=0; j<col; j++) {  
                printf("%d \t", arr[i][j]);  
           }  
           printf("\n");  
      }  
      return 0;  
 }   

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