From: Reid Thompson <Reid.Thompson@...>
Date: 2012-02-17T22:41:28+09:00
Subject: Re: Factorial

On Fri, 2012-02-17 at 18:35 +0900, Junayeed Ahnaf Nirjhor wrote:
> Hello,
> 
> What is the most efficient way in Ruby to calculate the factorial of any 
> given sum? Is there any way to make it as fast as in C?
> 
> Complexity doesn't matter as long as it works correctly.

see the first example here
http://www.zenspider.com/ZSS/Products/RubyInline/