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Factorial

Tool for computing factorials. Factorial n! is the product of all integers numbers (not zero) inferior or equal to n.

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Factorial -

Tag(s) : Arithmetics,Mathematics

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Factorial

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Factorial Calculator N!


Also on dCode: MultiplicationSubfactorial

Gamma Calculator Γ(N)


Also on dCode: Subfactorial

Tool for computing factorials. Factorial n! is the product of all integers numbers (not zero) inferior or equal to n.

Answers to Questions

How to calculate a factorial?

Factorial n is a simple multiplicationhref: the product of the integers numbers (not null) less or equal to n.

The usual notation to indicate a factorial is the exclamation mark positioned after the number.

4! = 1*2*3*4 = 24

Note that the factorial of zero is equal to 1 : 0! = 1.

0! = 1, 1! = 1, 2! = 2, 3! = 6, 4! = 24, 5! = 120, 6! = 720, 7! = 5040, 8! = 40320, 9! = 362880, 10! = 3628800, etc.

What is the Gamma Function?

Euler-Gamma is an extension of the factorial function over the Complex numbershref. dCode offers calculation over the Reals. $$ \forall\,n \in \mathbb{N}, \; \Gamma(n+1)=n! $$

How to calculate a negative factorial?

You have to use the Gamma function.

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Source code

dCode retains ownership of the source code of the script Factorial. Except explicit open source licence (free / freeware), any algorithm, applet, software (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any snippet or function (convert, solve, decrypt, encrypt, decipher, cipher, decode, code, translate) written in PHP (or Java, C#, Python, Javascript, etc.) which dCode owns rights can be transferred after sales quote. So if you need to download the Factorial script for offline use, for you, your company or association, see you on contact page !

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