﻿ C# Sharp Exercises: Check whether a Given Matrix is an Identity Matrix - w3resource

# C# Sharp Exercises: Check whether a Given Matrix is an Identity Matrix

## C# Sharp Array: Exercise-31 with Solution

Write a program in C# Sharp to Check whether a Given Matrix is an Identity Matrix.

Sample Solution:-

C# Sharp Code:

``````//In a square matrix if all the main diagonal elements are 1's and
//all the remaining elements are 0's is called an Identity Matrix.

using System;
class Exercise31
{
public static void Main()
{
int[,] arr1 = new int[50,50];
int i, j, r1,c1;

Console.Write("\n\n Check whether a Given Matrix is an Identity Matrix :\n ");
Console.Write("-----------------------------------------------------------\n");

Console.Write(" Input the orders(2x2, 3x3, ...) of squere matrix : ");
r1 = Convert.ToInt32(Console.ReadLine());
c1=r1;

Console.Write(" Input elements in the matrix :\n");
for(i=0;i<r1;i++)
{
for(j=0;j<c1;j++)
{
Console.Write(" element - [{0}],[{1}] : ",i,j);
arr1[i,j] = Convert.ToInt32(Console.ReadLine());
}
}
Console.Write(" The matrix is :\n");
for(i=0;i<r1;i++)
{
for(j=0;j<c1 ;j++)
Console.Write(" {0}  ",arr1[i,j]);
Console.Write("\n");
}
for (i = 0; i < r1; i++)
{
for (j = 0; j < c1; j++)
{
if ((i == j && arr1[i, j] != 1) || (i != j && arr1[i, j] != 0))
{
goto label;
}
}
}
Console.WriteLine(" The matrix is an Identity Matrix.\n\n");
return;
label:
Console.WriteLine("\n The matrix is not an Identity Matrix\n\n");
}
}
```
```

Sample Output:

```Check whether a Given Matrix is an Identity Matrix :
-----------------------------------------------------------
Input the orders(2x2, 3x3, ...) of squere matrix : 2
Input elements in the matrix :
element - [0],[0] : 1
element - [0],[1] : 0
element - [1],[0] : 0
element - [1],[1] : 1
The matrix is :
1   0
0   1
The matrix is an Identity Matrix
```

Flowchart:

C# Sharp Code Editor:

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