using System;

public class Program

{

    public static void Main()

    {

        double value = 15.5;

        var text = "";

        text = value>0? String.Format("-{0}", value ):String.Format("{0}", value );

        Console.WriteLine(text);

        value = -16.6;

        text = value>0? String.Format("{0}", value ):String.Format("{0}", value );

        Console.WriteLine(text);

    }

}