# C Program to check whether Matrix is upper triangular matrix or not

*Check upper triangular matrix*

*Check upper triangular matrix*

Write a C Program to check whether a matrix is upper triangular matrix or not. Here’s simple program to check if matrix is upper triangular matrix. C program to check upper triangular matrix.

*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 check whether a matrix is upper triangular matrix or not which is successfully compiled and run on Windows System to produce desired output as shown below :

**SOURCE CODE : :**

**SOURCE CODE : :**

/* C Program to check whether a matrix is upper triangular matrix or not */ #include <stdio.h> int main() { int A[10][10],i,j,m,n; int row, col, isUpper; 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", &A[i][j]); } } printf("\nThe given matrix is :: \n\n"); for (i = 0; i < m; ++i) { for (j = 0; j < n; ++j) { printf("\t%d", A[i][j]); } printf("\n\n"); } /* * Checks whether the matrix is Upper triangular */ isUpper = 1; for(row=0; row<m; row++) { for(col=0; col<n; col++) { /* * If elements below the main diagonal (col<row) * is not equal to zero then it is not upper triangular matrix */ if(col<row && A[row][col]!=0) { isUpper = 0; } } } /* * If it is upper triangular matrix */ if(isUpper==1) { printf("\nThis is a Upper triangular matrix.\n"); for(row=0; row<m; row++) { for(col=0; col<n; col++) { if(A[row][col] != 0) { printf("\t%d ", A[row][col]); } else { printf("\t"); } } printf("\n\n"); } } else { printf("\nThis is Not a Upper triangular matrix."); } return 0; }

**Output : :**

**Output : :**

/* C Program to check whether a matrix is upper triangular matrix or not */ 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 :: 0 Enter a[1][1] value :: 4 Enter a[1][2] value :: 5 Enter a[2][0] value :: 0 Enter a[2][1] value :: 0 Enter a[2][2] value :: 6 The given matrix is :: 1 2 3 0 4 5 0 0 6 This is a Upper triangular matrix. 1 2 3 4 5 6 Process returned 0

Above is the source code for C Program to check whether a matrix is upper triangular matrix or not which is successfully compiled and run on Windows System.The Output of the program is shown above .

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