12.EvenNumber

using System;

namespace _12.EvenNumber
{
    class Program
    {
        static void Main(string[] args)
        {
            bool isEven = false;

            while (!isEven)
            {
                int input = Math.Abs(int.Parse(Console.ReadLine()));

                if (input % 2 != 0)
                {
                    Console.WriteLine("Please write an even number.");
                    continue;
                }
                else
                {
                    Console.WriteLine($"The number is: {input}");
                    isEven = true;
                    return;
                }
            }
        }
    }
}