{"post":"

C program to check whether a matrix is upper triangular and lower triangular without using an array

Here, We’ll learn to write a program to check whether the given matrix is upper triangular or not in C programming language.

Upper Triangular Matrix: An upper triangular matrix is a special type of matrix that has all of its elements below the main diagonal (the diagonal from the top left to the bottom right of the matrix) set to zero.

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Source: https://commons.wikimedia.org/wiki/File:Triangular_matrix.svg

Initialize variables is_uppr and is_lowr to 1.
Take input for the number of rows and the matrix.
Iterate through the matrix.
If any element below the main diagonal is non-zero, set is_uppr to 0.
If any element above the main diagonal is non-zero, set is_lowr to 0.
If is_uppr or is_lowr is 1, print \"Upper Triangular\".
Else, print \"Not Upper Triangular\".

Code:

#include <stdio.h>\n\nint main()\n{\n    int n, i, j, is_uppr = 1, is_lowr = 1, a;\n\n    printf(\"Enter the number of rows:: \");\n    scanf(\"%d\", &n);\n\n    printf(\"Enter the Array::\\n\");\n    for (i = 0; i < n; i++)\n    {\n        for (j = 0; j < n; j++)\n        {\n            scanf(\"%d\", &a);\n            if (j > i && a != 0) //Check for upper triangular condition\n                is_uppr = 0;\n            if (j < i && a != 0) //Check for lower triangular condition\n                is_lowr = 0;\n        }\n    }\n    if (is_uppr == 1 || is_lowr == 1)\n        printf(\"Upper Triangular\\n\");\n    else\n        printf(\"Not Upper Triangular\\n\");\n\n    return 0;\n}\n\n

Output

Enter the number of rows:: 4\nEnter the Array::\n1 0 0 0\n0 2 0 0\n0 0 3 0\n0 0 0 4\nUpper Triangular\n\nEnter the number of rows:: 3\nEnter the Array::\n1 2 0\n3 4 5\n6 7 8\nNot Upper Triangular\n\n

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