using System;

namespace HelloWorldApplication
{
    class HelloWorld
    {
        static void Main(string[] args)
        {
            Console.WriteLine("please enter a number: ");
            int a;
            a = int.Parse(Console.ReadLine());
            while(a!=0)
            {
                int  b;
                b = a % 2;

                if (b == 0)
                    Console.WriteLine("number is even");
                else
                    Console.WriteLine("number is odd");
                Console.WriteLine("please enter a number: ");
                a = int.Parse(Console.ReadLine());
            }
        }
    }
}