User:Σ/Testing facility/Factorial

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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)

The above documentation is transcluded from User:Σ/Testing facility/Factorial/doc. (edit | history)
Editors can experiment in this template's sandbox (create | mirror) and testcases (create) pages.
Add categories to the /doc subpage. Subpages of this page.