Question

Is it possible to have a string, like $10.50 and do math on it within javascript? I can’t find an answer on this site.

JSFIDDLE

HTML:

<p id="cost">$10.50</p>
---
<div id="output"></div>

​
JavaScript:

$('#output').html($('#cost').html() / 2);​

Output:

NaN

Answer 1

You can do math on it if you strip away the dollar sign using; since it’s usually at the first position, you can simply use .substring(1) on the string value.

$('#output').html($('#cost').html().substring(1) / 2);​