using System; 

 public class primeno { 

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

    public primeno(int a) 

    { 

        n = a;  

    } 

    public void demo() 

    { 

                  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.");       

    } 

} 

public class GFG { 

    public static void Main() 

    {  

        primeno g = new primeno( 2); 

        g.demo(); 

  } 

}