Get decimals of a number

Asked Dec 21 '16 at 15:03

Active Dec 21 '16 at 15:06

Viewed 42 times

10.1 - Math.floor(10.1) returns 0.09999999999999964

I was expecting to get 0.1. How can this be achieved?

console.log(10.1 - Math.floor(10.1));

edited Dec 21 '16 at 15:05

PM 77-1

asked Dec 21 '16 at 15:03

Daarwin

You have many response here http://stackoverflow.com/questions/4512306/get-decimal-portion-of-a-number-with-javascript – L. Carbonne Dec 21 '16 at 15:06
10.1 - 10 is also not 0.1 btw – Alex K. Dec 21 '16 at 15:06
Oh. I guess all my calculators are broken then. Thanks for the tip. – Daarwin Dec 21 '16 at 15:08
1

This is the limitation of using binaries to store decimal numbers, you lose precision. – Alic Dec 21 '16 at 15:09
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I see. Thanks @Alic. I will read up on this. – Daarwin Dec 21 '16 at 15:15
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Math in JS is quite a headache; 0.1 + 0.2 is not 0.3 – vothaison Dec 21 '16 at 15:58
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@Lautaro Here's something to get you started: http://floating-point-gui.de/basic/ – Alic Dec 21 '16 at 16:00
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Thank you @Alic. Now i understand why and can work with it. Great! – Daarwin Dec 21 '16 at 16:20

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