Example: Lower Triangular Matrix example in C using for loop

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// Lower Triangular Matrix example in C using for loop
#include <stdio.h>
#define size 4

// @Utility function to check lower triangular matrix
int CheckLowerTriangularMatrix(int matrix[size][size]) {
    int i, j;
    for (i = 0; i < size; i++)
        for (j = i + 1; j < size; j++)
            if (matrix[i][j] != 0)
                return 0;
    return 1;
}

// @Driver function to run the program
int main() {
    int matrix[size][size], i, j;

    printf("The Size of the matrix is: %d\n", size);

    printf("\nEnter the matrix's elements:\n");
    for(i = 0; i < size; i++) {
        for(j = 0; j < size; j++)
            scanf("%d", &matrix[i][j]);
        printf("\n");
    }

    if (CheckLowerTriangularMatrix(matrix))
        printf("This is the Lower Triangular Matrix.\n");
    else
        printf("This not a Lower Triangular Matrix!\n");
    
    return 0;
}