Java, A Beginner's Guide, 5th Edition, 5th Edition

Using Parameters

It is possible to pass one or more values to a method when the method is called. Recall that a value passed to a method is called an argument. Inside the method, the variable that receives the argument is called a parameter. Parameters are declared inside the parentheses that follow the method’s name. The parameter declaration syntax is the same as that used for variables. A parameter is within the scope of its method, and aside from its special task of receiving an argument, it acts like any other local variable.

Here is a simple example that uses a parameter. Inside the ChkNum class, the method isEven( ) returns true if the value that it is passed is even. It returns false otherwise. Therefore, isEven( ) has a return type ...