Wrong result for a multiplication

Question

I have run the following code in several browser console and I had the same result everytime :

>>> (17.06 * 100) === 1706
false
>>> (6.06 * 100) === 606
true

This is not logic.

Where does the problem come from ?

Did you consider viewing the result of the multiplication? That would seem like a sensible first step. — cookie monster, Jul 23 '14 at 15:19

BenM · Accepted Answer · 2014-07-23T15:19:31.133

0

This is a floating point rounding error.

In JavaScript, 17.06 * 100 !== 1706, it's 1705.9999999999998.

If you want a detailed explanation, check out this article.

If you want the functionality, use Math.round():

>>> (Math.round(17.06 * 100) === 1706)
true

edited Jul 23 '14 at 15:19

answered Jul 23 '14 at 15:07

BenM

Why the downvotes?! This is the correct answer, surely? – BenM Jul 23 '14 at 15:19

1 Answers1