Types of Factorial: Recursive Factorial and Multifactorial (Especially for GATE-Geospatial 2022)

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There are two types of factorial:

This Diagram Shows Types of Factorial

Recursive Factorial

A recursive in mathematical logic and computer science is used to define the elements of a set using other elements in the set.

The classic example is the factorial function it is very easy to understand and to use.

Recursive factorial formula

Example,

Multifactorial

A common related notation is to use multiple exclamation points to denote a multifactorial, the product of integers in steps of two three , or more.

denotes the double factorial of n and is defined recursively by

For example, and

The sequence of double factorials for starts

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