How to extract decimal number from string using JavaScript

Question

I want to extract decimal number 265.12 or 0.0 from alphanumeric string (say amount) having value $265.12+ or $265.12- or $0.0+ or $0.0- and use it apply struts logic tag in JSP. Not sure how to extract number maybe with help of JavaScript.

Solution 1

You can use regex like this,

Live Demo

var amount = "$265.12+";
var doublenumber = Number(amount.replace(/[^0-9\.]+/g,""));

Solution 2

Without error checks, following will do:

var string = "$123123.0980soigfusofui"
var number = parseFloat(string.match(/[\d\.]+/))

123123.098

Comments

[Oleg V. Volkov]

How could he when he needs to extract, not print?

[250R]

there's a method called unformat() that returns number. E.g. accounting.unformat("$ 12,345,678.90"); // 12345678.9

[Ruben Murray]

I believe the regex can be shortened to /[\d.]+/ - stumbled upon that in JS