Code:
using System;
class pro
{
public static void Main()
{
Console.WriteLine("Enter the order: ");
int n = int.Parse(Console.ReadLine());
int[,] a = new int[3, 3];
int i, j;
Console.WriteLine("\n Enter the matrix\n");
for (i = 0; i < n; i++)
{
for (j = 0; j < n; j++)
{
a[i, j] = Convert.ToInt16(Console.ReadLine());
}
}
for (i = 0; i < n; i++)
{
for (j = 0; j < n; j++)
{
if ((i == j && a[i, j] != 1) || (i != j && a[i, j] != 0))
{
goto label;
}
}
}
Console.WriteLine("Identity Matrix");
return;
label:
Console.WriteLine("\n Not an Identity Matrix");
}
}
Output:
Enter the Order : 2
Enter the Matrix :
1
0
0
1
Identity Matrix
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