C Programming. Sum of left diagonal and right diagonal of a matrix.

Sum of left diagonal and right diagonal of a matrix.

#include<stdio.h>

int main() {

    int a[3][3];

    int sl=0,sr=0;

    printf("Enter elements of an matrix : \n");

    for (int i=0; i<3; i++){

        for (int j=0; j<3; j++){

            scanf("%d",&a[i][j]);

        }

    }

    for (int i=0; i<3; i++){

        sl=sl+a[i][i];

        sr+=a[i][2-i];

    }

    printf("sum of left diagonal : %d\nsum of right diagonal : %d",sl,sr);

    return 0;

}

Output:-

Enter elements of an matrix : 1 5 4 2 3 4 2 5 4 sum of left diagonal : 8 sum of right diagonal : 9