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

var x = 100;
var negX = ( -x ); // => -100

Answer 2

If you don't feel like using Math.Abs * -1 you can you this simple if statement :P

if (x > 0) {
    x = -x;
}

Of course you could make this a function like this

function makeNegative(number) {
    if (number > 0) {
        number = -number;
    }
}

makeNegative(-3) => -3 makeNegative(5) => -5

Hope this helps! Math.abs will likely work for you but if it doesn't this little

Answer 3

The reverse of abs is Math.abs(num) * -1.

Answer 4

var i = 10;
i = i / -1;

Result: -10

var i = -10;
i = i / -1;

Result: 10

If you divide by negative 1, it will always flip your number either way.

Answer 5

num * -1

This would do it for you.

Answer 6

In vanilla javascript

if(number > 0)
  return -1*number;

Where number above is the positive number you intend to convert

This code will convert just positive numbers to negative numbers simple by multiplying by -1