Return only numbers from string

Question

I have a value in Javascript as

var input = "Rs. 6,67,000" 

How can I get only the numerical values ?

Result: 667000

Current Approach (not working)

var input = "Rs. 6,67,000"; var res = str.replace("Rs. ", "").replace(",",""); alert(res);  Result: 667,000 

Answer 1

This is a great use for a regular expression.

    var str = "Rs. 6,67,000";      var res = str.replace(/\D/g, "");      alert(res); // 667000

\D matches a character that is not a numerical digit. So any non digit is replaced by an empty string. The result is only the digits in a string.

The g at the end of the regular expression literal is for "global" meaning that it replaces all matches, and not just the first.

This approach will work for a variety of input formats, so if that "Rs." becomes something else later, this code won't break.