Fifth Chapter function

5 functions

Functions are also called methods.

5.1 Format of the function

modifier Returns a value type function name (parameter type parameter 1, ...). ) {

execute the statement;

return value;

}

You can have no return value type, replace with void, and return will not be written.

5.2 Features of the function

• Feature code can be encapsulated

• Improved reusability of the code

• function is executed only if it is called

Attention:

Functions can be called, but functions are no longer defined.

The smallest functional unit in Java is a function.

5.3 Overloading of functions

Concept: function name is the same, parameter number or parameter type is different

Features: independent of return value type, only related to parameters

Example:

int Add (int x,int y) {return x+y;}

int Add (int x,int y,int z) {return x+y+z;}

int Add (double x,double y) {return x+y;}

This article is from the "Java Basics" blog, so be sure to keep this source http://8163413.blog.51cto.com/8153413/1689725

Fifth Chapter function