# C# program to print the lower triangular matrix

Here, we are going to learn how to print the lower triangular matrix in C#?
Submitted by Nidhi, on November 05, 2020 [Last updated : March 19, 2023]

## Printing Lower Triangular Matrix

Here, we read a matrix from the user and then print the lower triangular matrix on the console screen.

## C# code to print lower triangular matrix

The source code to print the lower triangular matrix is given below. The given program is compiled and executed successfully on Microsoft Visual Studio.

//C# program to print lower triangular matrix.

using System;

class MatrixDemo
{
public static void Main(string[] args)
{
int i   = 0;
int j   = 0;

int row = 3;
int col = 3;

int[,] Matrix = new int[row, col];

Console.Write("Enter the elements of matrix: ");
for (i = 0; i < row; i++)
{
for (j = 0; j < col; j++)
{
}
}

Console.WriteLine("\nMatrix");
for (i = 0; i < row; i++)
{
for (j = 0; j < col; j++)
{
Console.Write(Matrix[i, j] + "\t");
}
Console.WriteLine();
}

Console.WriteLine("Lower triangular matrix: ");
for (i = 0; i < row; i++)
{
Console.WriteLine();
for (j = 0; j < col; j++)
{
if (i >= j)
Console.Write(Matrix[i, j] + "\t");
else
Console.Write(" \t");
}
}

Console.WriteLine();
}
}

## Output

Enter the elements of matrix: 1
2
3
4
5
5
6
7
8

Matrix
1       2       3
4       5       5
6       7       8
Lower triangular matrix:

1
4       5
6       7       8
Press any key to continue . . .

## Explanation

In the above program, we created a class MatrixDemo that contains the Main() method. Here, we read a 3X3 matrix and then print the lower triangular matrix on the console screen using the below code.

for (i = 0; i < row; i++)
{
Console.WriteLine();
for (j = 0; j < col; j++)
{
if (i >= j)
Console.Write(Matrix[i, j] + "\t");
else
Console.Write(" \t");
}
}