sum of floats gives no decimals in javascript

Question

I have 2 strings that have a 0 and a 16,63 as follows:

var diferencia = "0";
var estalviPotencia = "16,63";

If I put an alert to see its value with two decimals I obtain:

alert(parseFloat(diferencia).toFixed(2)) -- returns 0,00
alert(parseFloat(estalviPotencia).toFixed(2)) -- returns 16,63

But if I actually sum them and then get the value I get:

alert((parseFloat(diferencia) + parseFloat(estalviPotencia)).toFixed(2)); -- returns 16,00

I can't see the error and why I am obtaining that number...

Edit por possible duplicate:

I am NOT saying that the decimals are wrong as said on that answer (which asks why there so MANY decimals but why I am NOT obtaining any decimals at all.

@RayonDabre I don't understand why it IS happening to me though (I'm working in asp.net) It clearly is supposed to work. — Miquel Coll, Apr 22 '16 at 10:19
OKAY I found the problem. It seems like putting a comma ',' on the 16,63 makes the parseFloat to actually ignore whatever is next to the comma! — Miquel Coll, Apr 22 '16 at 10:25
Got it - if you can remove the duplicate thing i'll add the answer. in here - it's because it's a comma instead of a decimal point, so it's only reading the numerical characters up to the non-numerical character Damn - you beat me to it! — Ben Green, Apr 22 '16 at 10:26
@RajaprabhuAravindasamy, Need to close it as _"This question was caused by a problem that can no longer be reproduced or a simple typographical error."_ — Rayon, Apr 22 '16 at 10:26

score 3 · Accepted Answer · answered Apr 22 '16 at 10:28

3

There's a comma instead of a decimal point in

var estalviPotencia = "16,63";

so it's only reading the numerical characters up to the non-numerical character.

change it into a decimal point and it'll work correctly.

answered Apr 22 '16 at 10:28

Ben Green

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That's indeed the solution. Is there any way to work WITH the commas? because I'm seeing I'll have to put a lot of .replace(',', '.') everywhere.... – Miquel Coll Apr 22 '16 at 10:29
1

Unfortunately str.replace is the way to go - probably best to write a function to handle the replace - parse - convertToFixed method, then you won't be having to rewrite it all each time – Ben Green Apr 22 '16 at 10:31

sum of floats gives no decimals in javascript

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