From: Viera Tarcova <faithfromslovakia@...>
Date: 2012-02-07T04:01:58+09:00
Subject: Easy loop question

Hello guys, this loop makes all the even numbers being divided by two
and odd numbers multiplied by three plus one.
But how would you make the loop stop when it gets to number one?
Thank you


def f n # this function calculates next number in your sequence
  if n % 2 == 0 # n is even
    return n / 2
  else
    return n * 3+1
  end
end

num = gets.to_i # read in a number
while true # infinitely...
  num = f(num) # find the next number
  puts num # print it
  sleep 1 # wait one second
end

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