From: Mathieu Bouchard <matju@...>
Date: 2000-06-26T21:41:14-04:00
Subject: [ruby-talk:03665] Re: Another small quiz

> The following appeared in chapter 3 of the Ruby's User Guide:
> def fact(n)
> 	if n == 0
> 		1
> 	else
> 		n * fact(n-1)
> 	end
> end
> Is everything OK here?

The function is defined on natural numbers (0 and its successors). If this
is a given, then yes, the above definition is correct.

Using the FAQ's inject function, you may also write:

def fact(n)
	(1..n).inject(1) {|a,b| a * b }
end



Mathieu Bouchard