C Program to Find Sum of Diagonal Elements in a Matrix

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

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