Print_Sequence

using System;

namespace Problem_9__PrintSequence
{
    class PrintSequence
    {
        public static void Main ()
        {
            int len = 12;
            string output = "";

            for (int i = 2; i < len; i++)
            {
                int num = (i % 2 == 0) ? i : (i * (-1));
                output += (i != (len - 1)) ? num + ", ": num.ToString();
            }
            Console.WriteLine ("{0}", output);
        }
    }
}