Math Class

In Java with the help of Math class we can perform certain Mathematics.  

Let's have a look- 

System.out.println(Math.min(20,40)); 

>Print-20

System.out.println(Math.max(30,10); 

>Print-30 

System.out.println(Math.sqrt(36)); 

>Print-6  

System.out.println(Math.abs(-16.09)); 

>Print-(16.09 -without negative sign) 

System.out.println(Math.random()); 

>Print- random decimal value 

How to get integer random no.- 

int a; 

a=(int)(Math.random()*21); //Typecasting to int

??(a); // print a