gistfile1.rb

#! /usr/bin/env ruby

require 'time'

puts "starting fibonacci"

def fib(num)
 if(num < 2)
   return 1
 else
   return fib(num-1) + fib(num-2)
 end
end

if ARGV[0] != nil
 if (ARGV[0].to_i >= 35)
  puts "This might take a bit...."
 end
 start = Time.now
 puts fib(ARGV[0].to_i)
 stop = Time.now - start
 puts "Finding the fib of #{ARGV[0]} took:"
 puts stop
 puts "seconds"
end