# QuantLib_Factorial man page

Factorial — Factorial numbers calculator

## Synopsis

`#include <ql/math/factorial.hpp>`

### Static Public Member Functions

staticReal get(Naturaln)

staticReal ln(Naturaln)

## Detailed Description

Factorial numbers calculator

**Tests**

the correctness of the returned value is tested by checking it against numerical calculations.

## Author

Generated automatically by Doxygen for QuantLib from the source code.

## Referenced By

ln(3) is an alias of QuantLib_Factorial(3).

Fri Sep 23 2016 Version 1.8.1 QuantLib