C Program To Find Factorial of a Number using Recursion

Опубликовано: 29 Сентябрь 2024
на канале: Technotip
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Lets write a C program to find Factorial of a user input number using Recursion.

Factorial Definition: Factorial of a positive integer n, denoted by n!, is the product of all positive integers less than or equal to n.

Important Note: By convention, Factorial of 0 is 1. i.e., 0! = 1.

Example: 5! = 5 x 4 x 3 x 2 x 1 which is equal to 120. i.e., 5! = 120.

Formula To Calculate Factorial of any positive integer number
We can calculate factorial of any number using this relationship:

num! = num * (num – 1)!

where num is a positive integer number.

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