using System;

​

namespace ja

{

    public class Program

    {

        public static void Main(string[] args)

        {

            int num, tt=1, gg=0;

            Console.Write("Enter number: ");

            num = Convert.ToInt32(Console.ReadLine());

            while(tt <= num)

            {

                if(num%tt == 0 )

                {

                    gg++;   

                }

                tt++;

            }

            if(num == 0 && num == 1)

            {

                Console.Write("The number is not prime.");

            }

            else if (gg == 2)

            {

                Console.Write("The number is  prime."); 

            }

          else

            {

            Console.Write("The number is not prime.");

            }

​

        }

    }

}