Types of Functions

Types of Functions

Functions can be classified into two types,

1. Pre-defined or Built-in or Library Functions

2. User-defined Function.

C++ provides a rich collection of functions ready to be used for various tasks. The tasks to be performed by each of these are already written, debugged and compiled, their definitions alone are grouped and stored in files called header files. Such ready-to-use sub programs are called pre-defined functions or built-in functions.

C++ also provides the facility to create new functions for specific task as per user requirement. The name of the task and data required (arguments) are decided by the user and hence they are known as User-defined functions.