Recursive function are the function are the function which called itself . and this processor is known as recursion . Recursion follow some rule and regulation . which are listed below...

__Rule of Recursion :- (Property of Recursion)__ Any recursive function must have following properties.

**1.**Should have a base case.( A base Case is the Case where the recursive function gives the concrete (exact) solution to the input. And therefore it helps in terminating the recursive function).

**2.**The recursive processor must proceed towards base case during the execution

**3.**There should be a recursive Call .

One more categorization of the recursion is as follows.

**A linear recursion includes only one recursive call inside the body of the function.**

__1. linear recursion :-__**2.Binary recursion :-**In this type of recursion the body of the function has two recursive call.

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