return_negative.rb

=begin
In this simple assignment you are given a number and have to make it negative.
But maybe the number is already negative?

Example:
makeNegative(1); # return -1
makeNegative(-5); # return -5
makeNegative(0); # return 0
Notes:

The number can be negative already, in which case no change is required.
Zero (0) can't be negative, see examples above.

=end

def makeNegative(num)
  return -1 * num if num.positive?
  num
  #or
  #-num.abs

end