using System;

public class Program

{

    public static void Main()

    {

        int Num=0;

        while (Num != -1)

        {

            Console.WriteLine("Please enter a number and (-1 to exit)");

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

            if(Num != -1)

            {

                Console.WriteLine("You have entered " + Num.ToString());

            }

        }

    }

}