javascript equation resulting in -0

Question

I have the javascript equation:

var sbal=pfWeight-gWeight-adjm;
$("#result").html(sbal.toFixed(5));

If the result is 0, I assign the result the CSS color green. If it is not 0, I assign the result the CSS color red.

My problem is that sometimes the math comes out as -0 and thus displays as red.

I even tried

if(sbal===0){sbal=parseInt(0);}

sbal===0 returns true.

How can I work around this?

jsfiddle

I know that Are +0 and -0 the same? addresses WHY -0 = +0 but it does not supply and answer on how to fix the problem.

-0 should be equal to +0 http://stackoverflow.com/questions/7223359/are-0-and-0-the-same could you show us the code where you attribute the CSS color? — Romain Braun, May 29 '15 at 18:33

Pavlin · Accepted Answer · 2015-05-29T18:54:18.687

1

If your only issue is that it sometimes returns -0, you can simply calculate the absolute value of your return value

Math.abs(-0); // 0

Edit: Javascript has a strange rounding of floating point numbers: If you roundup the result it works fine, then you don't need Math.abs(-0). As was pointed out -0 and 0 should be the same value.

This worked for me:

var sbal = Math.ceil(pfWeight - gWeight - adjm);

edited May 29 '15 at 18:54

answered May 29 '15 at 18:33

Pavlin

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I get the same. I added a jsfiddle link. thanks – Shawn May 29 '15 at 18:42
I updated the answer, Javascript floating point number rounding seems a bit strange. – Pavlin May 29 '15 at 18:54

javascript equation resulting in -0

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