By | 18.11.2016

# Print diagonal elements of a Matrix

Write a C Program to print diagonal elements of a Matrix. Here’s simple Program to print diagonal elements of a Matrix in C Programming Language.

## What is Matrix ?

Matrix representation is a method used by a computer language to store matrices of more than one dimension in memory. C uses “Row Major”, which stores all the elements for a given row contiguously in memory.

Two-dimensional Arrays : :

The simplest form of multidimensional array is the two-dimensional array. A two-dimensional array is, in essence, a list of one-dimensional arrays. An m × n (read as m by n) order matrix is a set of numbers arranged in m rows and n columns.

To declare a two-dimensional integer array of size [x][y], you would write something as follows −

• type arrayName [ x ][ y ];

Where type can be any valid C data type and arrayName will be a valid C identifier.

Below is the source code for C Program to print diagonal elements of a Matrix which is successfully compiled and run on Windows System to produce desired output as shown below :

### SOURCE CODE : :

```/*  C Program to print diagonal elements of a Matrix  */

#include<stdio.h>

int main()
{
int array1[10][10],i,j,m,n,sum = 0;

printf("Enter no. of rows :: ");
scanf("%d", &m);
printf("\nEnter no. of cols :: ");
scanf("%d",&n);
printf("\nEnter values to the matrix :: \n");
for (i = 0; i < m; i++)
{
for (j = 0; j < n; j++)
{
printf("\nEnter a[%d][%d] value :: ",i,j);
scanf("%d", &array1[i][j]);
}
}

printf("\nThe Diagonals elements of a matrix are :: \n\n");

/*check condition to print diagonals, matrix must be square matrix*/
if(m==n)
{
/*print diagonals*/
for(i=0;i<m;i++)
{
for(j=0;j<n;j++)
{

if(i==j)
printf("\t%d", array1[i][j]);    /*print elements*/
else
printf("\t");   /*print space*/
}
printf("\n\n");   /*after each row print new line*/
}
}
else
{
printf("\nMatrix is not a Square Matrix.");
}

return 0;
}```

### Output : :

```/*  C Program to print diagonal elements of a Matrix  */

Enter no. of rows :: 3

Enter no. of cols :: 3

Enter values to the matrix ::

Enter a[0][0] value :: 1

Enter a[0][1] value :: 2

Enter a[0][2] value :: 3

Enter a[1][0] value :: 4

Enter a[1][1] value :: 5

Enter a[1][2] value :: 6

Enter a[2][0] value :: 7

Enter a[2][1] value :: 8

Enter a[2][2] value :: 9

The Diagonals elements of a matrix are ::

1

5

9

Process returned 0```

Above is the source code for C Program to print diagonal elements of a Matrix which is successfully compiled and run on Windows System.The Output of the program is shown above .

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Category: C Programming Matrix Programs Tags:

My name is Tunde Ajetomobi, a Tech Enthusiast and Growth Hacker. I enjoy creating helpful content that solves problem across different topics. Codezclub is my way of helping young aspiring programmers and students to hone their skills and find solutions on fundamental programming languages.

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