Positive Number to Negative Number in JavaScript?

Question

Basically, the reverse of abs. If I have:

if ($this.find(\'.pdxslide-activeSlide\').index() < slideNum - 1) {
  slideNum = -slideNum
}
console.log(slideNu         


        

Answer 1

To get a negative version of a number in JavaScript you can always use the ~ bitwise operator.

For example, if you have a = 1000 and you need to convert it to a negative, you could do the following:

a = ~a + 1;

Which would result in a being -1000.