why parseInt('08') is giving 0, whereas parseInt('07') is giving 7 [duplicate]

Question

Possible Duplicate:
Workarounds for JavaScript parseInt octal bug

I am working on javascript, and I seem to find this strange, that the javascript function parseInt('08') is returning 0 and parseInt('07') is returning 7.

this behavior seems to be there in Firefox.

parseInt('08') is returning 8 in IE, but 0 in Firefox..

Why? I want parseInt('08') to return 8, as expected and getting in IE.

Eadwine

Answer 1

Yeah, I came across this one before. It is really odd because some browsers interpret this as you wanting to parse it in base 8. Consider the following article:

http://www.breakingpar.com/bkp/home.nsf/0/87256B280015193F87256C85006A6604

basically, you have to tell the parser to use base 10 numbers:

parseInt('08', '10');

Keitloa

parseInt('08', '10');? Really? Usually we will just do +"08", since adding + in front of a String will turn it into Number without any problem. – Redneck

@Derik Post hoc ergo propter hoc – Cadmus

parseInt expects a number as second parameter so you should do parseInt('08', 10) instead of parseInt('08', '10') – Raleighraley