# Write a C Program to print diagonal elements of a Matrix

*Print diagonal elements of a Matrix*

*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 : :**

**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 : :**

**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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