This post originated from an RSS feed registered with Ruby Buzz by Daniel Berger. Original Post: That's not simplicity. *This* is simplicity. Feed Title: Testing 1,2,3... Feed URL: http://djberg96.livejournal.com/data/rss Feed Description: A blog on Ruby and other stuff. Latest Ruby Buzz Posts Latest Ruby Buzz Posts by Daniel Berger Latest Posts From Testing 1,2,3...

def factorial(x)
   raise ArgumentError if x < 0
   return 1 if x <= 1  
   x * factorial( x - 1 )
end

fac n | n > 0 = product [1..n]