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 nan = Double.NaN;
Console.WriteLine(nan); // NaN
double infinity = Double.PositiveInfinity;
Console.WriteLine(infinity); // Infinity
}