User:Σ/Testing facility/Factorial/doc

This is a documentation subpage for User:Σ/Testing facility/Factorial.
It may contain usage information, categories and other content that is not part of the original user template page.

This template finds the factorial of a number. To use it, enter:
{{factorial|input}}
The input must be a positive integer smaller than 100 (better than most calculators, which go up to only 69). This template works by repeating conditional multiplications. Examples:

{{factorial|2}} gives 2

{{factorial|3}} gives 6

{{factorial|5}} gives 120

{{factorial|10}} gives 3628800

{{factorial|80}} gives 2.4329020081766E+18

{{factorial|0.5}} gives 1

(invalid input)

{{factorial|-1}} gives

(invalid input)