June 2024
Beginner to intermediate
957 pages
16h 58m
English
Content preview from Java and Algorithmic Thinking for the Complete Beginner
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Chapter 36 User-Defined Subprograms
36.1 Subprograms that Return a Value
In many computer languages, a subprogram that returns a value is called a function. Java calls them methods and there are two categories of methods. There are the built-in methods, such as Math.abs(), Math.sqrt(), and there are the user-defined methods, those that you can personally write and use in your own programs.
The general form of a Java method that returns a value is shown here.
static return_type name([type1 arg1, type2 arg2, type3 arg3, …]) {
Local variables declaration section
A statement or block of statements
return value;
}
where
►return_type is the data type of the value that the method returns.
►name is the name of the method.
►arg1, arg2, arg3, … is ...
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