How to find a number in a string using JavaScript?

Question

Suppose I have a string like - "you can enter maximum 500 choices". I need to extract 500 from the string.

The main problem is the String may vary like "you can enter maximum 12500 choices". So how to get the integer part?

Answer 1

var regex = /\d+/g;
var string = "you can enter maximum 500 choices";
var matches = string.match(regex);  // creates array from matches

document.write(matches);

References:

    http://www.regular-expressions.info/javascript.html

    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp