using System;

public class Program

{

    public delegate void CheckDigitDelegate(int num);

    public bool EvenOrOdd(int num)

    {

        return num % 2 == 0;

    }

    public static void IsPrimeNumber(int num)

    {

        Console.Write("Enter a Number : ");

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

        bool IsPrime = true;

        for (int i = 2; i < number/2; i++)

        {

            if (number % i == 0)

            {

                IsPrime = false;

                break;

            }

        }

        if (IsPrime)

        {

            Console.Write("Number is Prime.");

        }

        else

        {

            Console.Write("Number is not Prime.");

        }

    }

    public static void Main()

    {

        CheckDigitDelegate del = new CheckDigitDelegate(IsPrimeNumber);

        del(5);

    }

}