Friday, 1 December 2017

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


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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