FUNCTION

Function: a function is a group of statements that together perform a task. Every c++ program has at least one function, which is main(), and all the most trivial programs can define additional functions. You can divide up your code into separate functions.

Part of function:

1. Return type

2. Function name

3. Parameters

4. Body

Types of function

1. Predefine function 

                   Example:     clrscr();

                                      getch();

2. User define function   

                   a. Default function 

                                      Example: void Ashish();

                   b. Parameterised:

                                      Example: void Raushan(int a, int b)