using System;

public class Program

{

    public static void Main()

    {

        float fpi = 3.141592653589793238f;

        Console.WriteLine(fpi);//3.141593

        double dpi = 3.14192653589793238;

        Console.WriteLine(dpi);//3.14159265358979

        double nan = double.NaN;

        Console.WriteLine(nan);//no es numero (not a numer)

        double inf = double.PositiveInfinity;

        Console.WriteLine(inf);//INFINITO

    }

}