From: Serabe <serabe@...>
Date: 2008-07-14T09:04:42+09:00
Subject: Re: Factorials

The easy way:

def factorial(n)
  if n==1
    1
  else
    n*factorial(n-1)
  end
end

puts factorial(5)

It prints 120.

A more ruby way method:

def factorial(n)
  (1..n).inject(1) {|product, n| product * n }
end

puts factorial(5)

It does also print 120.

Regards,

Serabe

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