In this simple assignment you are given a number and have to make it negative. But maybe the number is already negative?
Examples
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) is not checked for any specific sign. Negative zeros make no mathematical sense.
def makeNegative(num)
-num.abs
end