using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(1.2.ToString("F15"));

        Console.WriteLine(1.2.ToString("F17"));

        Console.WriteLine(1.2.ToString("F50"));     

        Console.WriteLine(1.2.ToString("F99"));     

        Console.WriteLine(1.2.ToString("F100"));            

    }

}