Function

A function is also called as module. It is used to perform some specific task.

There are two types of function: -

     a.     Pre-defined function: -              Those functions which are already created by developers are called as pre-defined function.

     b.     User defined function: -             Those functions which are created and managed by user are called as user defined function.

Types of user defined function

     1.     No return and no formal argument

     2.     Return but no formal argument

     3.     No return but formal argument

     4.     Return with formal argument

Types of calling function: -

There are two types of calling function

     1.     Call by value

     2.     Call by reference

Function and Array

Recursion

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