Math class has a collection of helpful methods for carrying out mathematical computations. These methods have a special form. They are static methods that do not operate on an object. You need to call the method on the name of the class itself. For Example, number vaule x can be a parameter of the Math.sqrt method: Math.sqrt(x);
A method such as Math.sqrt()that does not operate on any object is called a static method. Static methods do not operate on objects, but they are still defined inside classes. You must specify the class to which the sqrt method belongs - hence the call is Math.sqrt(x);
Consider the following links:
a) More on static mehtods
or
n) or next to More on Strings
r) or back to Math Functions
x) or out to More on Variables and Data Types