Parsing the string "009" as integer in javascript?

Question

how to parse 009 in javascript i need return value as 9 but it returns 0.
But when i parse 001 it returns 1.

var tenant_id_max = '3-009';
tenant_id_split = tenant_id_max.split("-");
var tenant_id_int = tenant_id_split[1];
var tenant_id_count = parseInt(tenant_id_int);

Denys Séguret · Accepted Answer · 2012-10-05 16:43:49Z

18

Do

var tenant_id_count = parseInt(tenant_id_int, 10);

That's because a string starting with "0" is parsed as octal (which doesn't work very well for "009", hence the 0 you get) if you don't specify the radix.

From the MDN :

If the input string begins with "0", radix is eight (octal). This feature is non-standard, and some implementations deliberately do not support it (instead using the radix 10). For this reason always specify a radix when using parseInt.

The most important thing to remember is Always specify the radix.

answered Oct 5, 2012 at 16:43

Denys Séguret

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1 Comment

saml Over a year ago

It means parse it as a bes 10 (decimal) number. Number strings starting with a 0 get parsed automatically as base 8

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