public class DemoMath
{
    public static void main(String[] args)
    {
       int a=5;
       int b=10;
       int abs=Math.abs(a);
       int max=Math.max(a,b);

       double pow=Math.pow(a,a);
       double pi=Math.PI;

        System.out.println(abs);
        System.out.println(max);
        System.out.println(pow);
        System.out.println(pi);



               

    }
}