Function Prototypes and Scope

Function prototypes help declare functions before they are used.

Variable scope determines where a variable can be accessed.

In this lesson, you will learn:

• How to use function prototypes.
• The difference between local and global variables.
• How variable scope affects program behavior.

What is a Function Prototype?

A function prototype is a declaration of a function before it is defined.

Syntax:

returnType functionName(parameterType1, parameterType2);

Example:

int add(int, int);