Javascript doesn't like 16.1 value?

Question

Possible Duplicate:
Is JavaScript’s Math broken?

Funny question, but why at 16.1 javascript become "crazy"? :)

var value1=16.1;
var value2=16.2;

console.log(value1 * 1000);
console.log(value2 * 1000);

Output :

16100.000000000002
16200

Why?

This questions comes out now and then but Stack Overflow's search engine makes it impossible to find the precise dupes :( — Álvaro González, Nov 06 '12 at 09:34

score 1 · Answer 1 · edited May 23 '17 at 12:18

1

It's not a javascript problem, it's a problem related to any programming language using floating point numbers, see

Is floating point math broken?

for explanation of the root problem and for some useful workarounds too.

edited May 23 '17 at 12:18

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answered Nov 06 '12 at 09:37

Nelson

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score 1 · Accepted Answer · edited May 23 '17 at 12:04

1

That's because javascript casts everything to a double internally. As a result, all calculations pick up some noise due to floating point inaccuracy: Floating point inaccuracy examples

One way to fix this issue, is to just round down to the nearest int after all intermediate calculations.

Answer Copy From Here

edited May 23 '17 at 12:04

Community

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answered Nov 06 '12 at 09:37

Zaheer Ahmed

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Javascript doesn't like 16.1 value?

2 Answers2