0 + integer is weird in JS

Question

Go to your browser's JS console and try these:

-14
// -14

-014
// -12

-24
// -24

-024
// -20

-0024
// -20

012
// 10

Why is this 0-integer construct giving me results that are 2 smaller in absolute value?

have you heard of octal numbers. 014 is nothing but octal representation of 12. same goes with 024. — Prabhu Murthy, Sep 22 '14 at 07:42

score 4 · Accepted Answer · answered Sep 22 '14 at 07:44

4

"Never write a number with a leading zero (like 07). Some JavaScript versions interpret numbers as octal if they are written with a leading zero." (see: http://www.w3schools.com/js/js_numbers.asp)

answered Sep 22 '14 at 07:44

Benedikt

954
3
14
25

4

Usual W3Schools... They could have choosen a different number for their example. 07 === 7. – MaxArt Sep 22 '14 at 07:53

0 + integer is weird in JS

1 Answers1