Javascript division

Question

In my console browser, I put:

666.66/10

And I get:

66.666

(As expected). But when I put:

6666.66/10

I get:

666.6659999999999

Can someone explain me why this happen? It shouldn't be: 666.666 ?

Its due to floating point See this answer http://stackoverflow.com/questions/1458633/elegant-workaround-for-javascript-floating-point-number-problem — cgatian, Apr 08 '14 at 00:32
Because JS sucks? Well, maybe that doesn't help, but probably something to do with floating point math. — Charles Goodwin, Apr 08 '14 at 00:33

score 2 · Answer 1 · answered Apr 08 '14 at 00:33

Computers don't store numbers in base 10, like we think - it's in base 2, so oddities like the one you've found are common.

Another one is 0.1 + 0.2, which counter intuitively equals 0.30000000000000004

If you want to safely divide numbers, either convert them to whole numbers first or use a library like BigDecimal

1 Answers1