Ruby for calculating a factorial using recursion.

factorial.rb

#!/usr/bin/env ruby

def factorial(i)
  if (i > 0) then
    print i
    return i = i * factorial(i - 1)
  end ### if
  return 1
end ### def

puts
print " = " + factorial(5).to_s
puts

#
# Outputs: 
# 54321 = 120
#