//
// HelloMath.java
//


public class HelloMath
{
    public static void main(String[] args)
    {
        System.out.println("Hello, math!");
        System.out.println(Math.PI);
        System.out.println(Math.E);

        System.out.println(Math.cos(0));
        System.out.println(Math.cos(Math.PI));

        System.out.println(Math.sin(0));
        System.out.println(Math.sin(Math.PI));

        // unit testing with round off error

        double result = Math.sin(Math.PI);
        double expected = 0.0;

        if (Math.abs(result-expected) < 1e-6) // check if result is close
            System.out.println("Yay!!!");
        else
            System.out.println("Boohoo.....");
    }
}