// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002337/double-sign

​

// @nuget: Z.ExtensionMethods

​

using System;

public class Program

{

    public static void Main()

    {

        string str = "{0,3} is {1} zero.";

        double[] values = { 7.03, 7.64, 0.12, 0.00, -0.12, -7.1, -7.6 };

​

        foreach (double value in values)

        {

            // C# Extension Method: Double - Sign

            Console.WriteLine(str, value, Display(value.Sign()));

        }

    }

    public static String Display(int compare)

    {

        if (compare == 0) 

            return "equal to";

        else if (compare < 0)  

            return "less than";

        else 

            return "greater than";

    }

}