Example: Display Lower Triangular Matrix in C

// Display Lower Triangular Matrix
#include <stdio.h>

int main() {
    // Step 1: Declare and initialize the square matrix
    int matrix[3][3] = {
        {1, 2, 3},
        {4, 5, 6},
        {7, 8, 9}
    };
    int rows = 3;
    int cols = 3;

    // Step 2: Display the original matrix for comparison
    printf("Original Matrix:\n");
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            printf("%d\t", matrix[i][j]);
        }
        printf("\n");
    }

    // Step 3: Display the lower triangular matrix
    printf("\nLower Triangular Matrix:\n");
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            // If the current element is on or below the main diagonal (i >= j)
            if (i >= j) {
                printf("%d\t", matrix[i][j]);
            } else {
                // Otherwise, print '0' for elements above the main diagonal
                printf("0\t");
            }
        }
        printf("\n");
    }

    return 0;
}