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C Program to check whether matrix is lower triangular matrix or not

robaa
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2022-11-24
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Write a C Program to check whether matrix is lower triangular matrix or not . Here’s simple program to print lower triangular matrix in C Programming Language. Write a C program to check lower triangular matrix.

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robaa
2022-11-24
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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 matrix is lower triangular matrix or not  which is successfully compiled and run on Windows System to produce desired output as shown below :

 
 
 

SOURCE CODE : :

/*  C Program to check whether matrix is lower triangular matrix or not  */

#include <stdio.h>

int main()
{
    int A[10][10],i,j,m,n;
    int row, col, isLower;

    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]);
        }
    }

    isLower = 1;
    for(row=0; row<m; row++)
    {
        for(col=0; col<n; col++)
        {
            /*
             * If elements above main diagonal(col>row)
             * is not equal to zero(A[row][col]!=0)
             */
            if(col>row && A[row][col]!=0)
            {
                isLower = 0;
            }
        }
    }

    if(isLower == 1)
    {
        printf("\nMatrix is Lower triangular matrix: \n\n");

        /*
         * Prints elements of lower triangular matrix
         */
        for(row=0; row<m; row++)
        {
            for(col=0; col<n; col++)
            {
                if(A[row][col]!=0)
                {
                    printf("\t%d", A[row][col]);
                }
            }

            printf("\n\n");
        }
    }
    else
    {
        printf("\nMatrix is not a Lower triangular matrix");
    }

    return 0;
}

Output : :

/*  C Program to check whether matrix is lower 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 :: 0

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

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

Enter a[1][1] value :: 3

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

Enter a[2][0] value :: 4

Enter a[2][1] value :: 5

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

Matrix is Lower triangular matrix:

        1

        2       3

        4       5       6


Process returned 0

Above is the source code for C Program to check whether matrix is lower 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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