Example: Diagonal Difference in C Program using For loop

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// Diagonal Difference in C Program using For loop
#include <stdio.h>

int main() {
    int s = 0;
    printf("Enter the size of the array::\n");
    scanf("%d", &s);
    
    int arr[s][s];
    printf("\nEnter the elements of the array in [%d x %d] matrix form::\n", s, s);
    
    int i=0;
    for (; i<s; i++) {
        int j=0;
        for (; j<s; j++) {
            scanf("%d", &arr[i][j]);
        }
    }
    
    // It will calculate the diagonal difference
    int df = 0, s2=s-1, d1=0, d2=0;
    i=0;
    for (; i<s; i++) {
        d1 += arr[i][i];
        d2 += arr[i][s2];
        s2--;
    }
    df = d1 > d2 ? d1 - d2 : d2 - d1;

    // It will return the final output
    printf("\nDiagonal Difference = %d\n", df);
    return 0;
}