In this tutorial, i am going to show you how to find sum of diagonal elements in a matrix in c programs.

## C Program to Find Sum of Diagonal Elements in a Matrix

/* C Program to find Sum of Diagonal Elements of a Matrix */ #include<stdio.h> int main() { int i, j, rows, columns, a[10][10], Sum = 0; printf("\n Please Enter Number of rows and columns : "); scanf("%d %d", &i, &j); printf("\n Please Enter the Matrix Elements \n"); for(rows = 0; rows < i; rows++) { for(columns = 0;columns < j;columns++) { scanf("%d", &a[rows][columns]); } } for(rows = 0; rows < i; rows++) { Sum = Sum + a[rows][rows]; } printf("\n The Sum of Diagonal Elements of a Matrix = %d", Sum ); return 0; }

The result of the above c program; as follows:

Please Enter Number of rows and columns : 3 3 Please Enter the Matrix Elements 1 2 3 4 5 6 7 8 9 The Sum of Diagonal Elements of a Matrix = 15