using System;

public class Program123

{

    public static void Main()

    {

         int n, i, m=0, flag=0;    

          Console.Write("Enter the Number to check Prime: ");    

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

          m=n/2;    

          for(i = 2; i <= m; i++)    

          {    

           if(n % i == 0)    

            {    

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

             flag=1;    

             break;    

            }    

          }    

          if (flag==0)    

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

    }

}