C# Program to Check If a Given Matrix is an Identity Matrix

This C# Program Checks If a Given Matrix is an Identity Matrix. Here An identity matrix is a square matrix, of size n × n, where the diagonal elements are all 1s, and the other elements are all 0s.

Here is source code of the C# Program to Check If a Given Matrix is an Identity Matrix. The C# program is successfully compiled and executed with Microsoft Visual Studio. The program output is also shown below.

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/*
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 * C# Program to Check If a Given Matrix is an Identity Matrix

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 */
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using System;
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class pro
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```
{
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    public static void Main()
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    {
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        Console.WriteLine("Enter the order: ");

        int n = int.Parse(Console.ReadLine());

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        int[,] a = new int[3, 3];
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        int i, j;
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        Console.WriteLine("\n Enter the matrix\n");

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        for (i = 0; i < n; i++)
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        {
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            for (j = 0; j < n; j++)
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            {
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                a[i, j] = Convert.ToInt16(Console.ReadLine());

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            }
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        }
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        for (i = 0; i < n; i++)
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        {
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            for (j = 0; j < n; j++)
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            {
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                if ((i == j && a[i, j] != 1) || (i != j && a[i, j] != 0))

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                {
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                    goto label;
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                }
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            }              
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        }
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    Console.WriteLine("Identity Matrix");

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    return;
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label:
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    Console.WriteLine("\n Not an Identity Matrix");

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    }
```
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}
```

Here is the output of the C# Program:

Enter the Order : 2
Enter the Matrix :
1
0
0
1
Identity Matrix

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