using System;

public class Program

{

    public static void Main()

    {float floatPI = 3.14f;

        Console.WriteLine(floatPI); //3.14

        double doublePI = 3.14;

        Console.WriteLine(doublePI); //3.14

        double num = 1.56e+12;

        Console.WriteLine(num); // 1560000000000

        double nan = Double.NaN;

        Console.WriteLine(nan); //NaN

        double infinity = Double.PositiveInfinity;

        Console.WriteLine(infinity); //Infinity

        Console.WriteLine("Hello World");

    }

}