How to return all except last 2 characters of a string?

Question

id = '01d0';
document.write('<br/>'+id.substr(0,-2));

How can I take a string like '01d0and get the01` (all except the last two chars)?

In PHP I would use substr(0,-2) but this doesn't seem to work in JavaScript.

How can I make this work?

Tomalak · Accepted Answer · 2011-06-10 09:32:22Z

160

You are looking for slice() (also see MDC)

id.slice(0, -2)

answered Jun 10, 2011 at 9:32

Tomalak

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1 Comment

Tim Down Over a year ago

The slice() is right. I'm always surprised by how few people know about it and its useful negative offsets.

James Allardice · Accepted Answer · 2011-06-10 09:32:41Z

11

Try id.substring(0, id.length - 2);

answered Jun 10, 2011 at 9:32

James Allardice

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Cyril N. · Accepted Answer · 2011-06-10 09:34:09Z

2

var str = "031p2";
str.substring(0, str.length-2);

See : http://jsfiddle.net/GcxFF/

answered Jun 10, 2011 at 9:34

Cyril N.

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Tom Wadley · Accepted Answer · 2011-06-10 09:34:22Z

2

Something like:

id.substr(0, id.length - 2)

The first parameter of substr is the starting index. The second parameter is how many characters to take.

answered Jun 10, 2011 at 9:34

Tom Wadley

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