Math opposite sign function?

Question

Does such function exist? I created my own but would like to use an official one:

private function opposite(number:Number):Number
     {
      if (number < 0)
      {
       number = Math.abs(number);
      }
      else
      {
       number = -(number);
      }
      return number;
     }

So, -5 becomes 5 and 3 becomes -3.

Edit: Forgive me for being stupid. I'm human. :)

Answer 1

yes it does...

return num*-1;

or simply

return -num;

Answer 2

Simply putting a negative sign in front of the variable or number will do the trick, even if it's already negative:

-(-5) => 5
$foo = 3; -$foo => -3

Answer 3

How about:

return -(number)

as -(-5) == 5.

Answer 4

This a trick question? why a function? just do number * -1, multiply with -1 that is.

Answer 5

try something like number = number * (-1)

Answer 6

You could use

number *= -1;

3 becomes -3 and -5 becomes 5 :)

Answer 7

number *= -1; or number = number * (-1);