#!/usr/bin/env ruby

#
# iFactorial0.rb
#
# Victor Hanson-Smith (with mods by Steve Fickas)
# QUESTIONS? -> {victorhs,fickas}@cs.uoregon.edu
#
# This Ruby script iteratively computes the factorial of an integer.
#


def fact(n)
   if n < 0
	puts "factorial is undefined for negative numbers\n"
	exit	#crashes the program
   end

   if n == 0
	return 1
   else
	result = 1
	while (n > 0)
		result = result * n
		n = n-1
	end
	return result
   end
end