/*
 * C# Program to Display Lower Triangular Matrix
 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication8
{
class Program
{
    int x;
    public static void Main(string[] args)
    {
        int m, n, i, j;
        Console.Write("Enter Number Of Rows And Columns Of Matrices A and B : ");
        m = Convert.ToInt16(Console.ReadLine());
        n = Convert.ToInt16(Console.ReadLine());
        int[,] A = new int[10, 10];
        Console.Write("\nEnter The First Matrix : ");
        for (i = 0; i < m; i++)
            {
                for (j = 0; j < n; j++)
                    {
                        A[i, j] = Convert.ToInt16(Console.ReadLine());
                    }
            }
        Console.Clear();
        Console.WriteLine("\nMatrix A : ");
        for (i = 0; i < m; i++)
            {
                for (j = 0; j < n; j++)
                    {
                        Console.Write(A[i, j] + "\t");
                    }
                Console.WriteLine();
            }
        Console.WriteLine("\n Setting Zero to illustrate Lower Triangular Matrix\n");
        for (i = 0; i < m; i++)
            {
                Console.Write("\n");
                for (j = 0; j < 3; j++)
                    {
                        if (i >= j)
                            Console.Write(A[i, j] + "\t");
                        else
                            Console.Write("0\t");
                    }
            }
        Console.ReadLine();
    }
}
}

/*
Enter Number Of Rows And Columns Of Matrices A and B : 3  3
Enter the First Matrix :
1 2 3
2 3 4
3 4 5
Matrix A :
1 2 3
2 3 4
3 4 5
Setting Zero to illustrate Lower Triangular Matrix :
1 0 0
2 3 0
3 4 5