C Programming Two Dimensional Array with Examples

Two-dimensional array in c programming; Through this tutorial, you will learn about two Dimensional Array in C with the help of examples.

Two Dimensional Array in C with Examples

Two Dimensional Array Definition in C
Two Dimensional Array Declaration in C
Initialization of Two Dimensional Array
Example 1 – Two Dimensional Array in C
Example 2 – Storing elements in a matrix and printing it using 2d array in C
Example 3 – Find sum of all elements in a 2D (Two Dimensional) Array

Two Dimensional Array Definition in C

In c programming; two-dimensional arrays are stored as arrays of arrays. It’s is also known as matrix array.

Note that:- A matrix can be represented as a table of rows and columns.

Two Dimensional Array Declaration in C

You can use the following syntax to declare a two-dimensional array in the c programming language; as shown below:

data_type array_name[rows][columns];

Let’s see the following example for how to declare two-dimensional array in c programming; as shown below:

int twodimen[4][3];

Here, 4 is the number of rows, and 3 is the number of columns.

Initialization of Two Dimensional Array

To initialize an array in c by using the index of each element. See the following easy way to initialize array in c programming; as shown below:

int disp[2][4] = { 10, 11, 12, 13, 14, 15, 16, 17};

Example 1 – Two Dimensional Array in C

#include<stdio.h>
int main(){
int i=0,j=0;
int arr[4][3]={{1,2,3},{2,3,4},{3,4,5},{4,5,6}};
//traversing 2D array
for(i=0;i<4;i++){
 for(j=0;j<3;j++){
   printf("arr[%d] [%d] = %d \n",i,j,arr[i][j]);
 }//end of j
}//end of i
return 0;
}

Output:

arr[0][0] = 1
arr[0][1] = 2
arr[0][2] = 3
arr[1][0] = 2
arr[1][1] = 3
arr[1][2] = 4
arr[2][0] = 3
arr[2][1] = 4
arr[2][2] = 5
arr[3][0] = 4
arr[3][1] = 5
arr[3][2] = 6

Example 2 – Storing elements in a matrix and printing it using 2d array in C

#include <stdio.h>
void main ()
{
    int arr[3][3],i,j;
    for (i=0;i<3;i++)
    {
        for (j=0;j<3;j++)
        {
            printf("Enter a[%d][%d]: ",i,j);
            scanf("%d",&arr[i][j]);
        }
    }
    printf("\n printing the elements ....\n");
    for(i=0;i<3;i++)
    {
        printf("\n");
        for (j=0;j<3;j++)
        {
            printf("%d\t",arr[i][j]);
        }
    }

    return 0;

}

Output of the above c program; as shown below:

Enter a[0][0]: 12
Enter a[0][1]: 45
Enter a[0][2]: 63
Enter a[1][0]: 45
Enter a[1][1]: 25
Enter a[1][2]: 12
Enter a[2][0]: 74
Enter a[2][1]: 85
Enter a[2][2]: 65

printing the elements ....

12	45	63
45	25	12
74	85	65

Example 3 – Find sum of all elements in a 2D (Two Dimensional) Array

Enter number of Rows :2
Enter number of Cols :2
Enter matrix elements :
Enter element [1,1] : 1
Enter element [1,2] : 2
Enter element [2,1] : 3
Enter element [2,2] : 4
SUM of all elements : 10