How to get numeric value from string JavaScript?
Simply use a regular expression in the replace function to get numbers from the string in JS. Regular expression for extracting a number is (/(\d+)/).
string.replace(/[^0-9]/g, '');This will delete all non-digit characters, leaving only digits in the string
Example of JavaScript extract number from string
Here is HTML example code, Regular expression will serve your purpose:
Where txt is given string (with number). It basically rips off anything that is not a digit
<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'>
var txt = 'ABC123 XYZ023'
var num1 = txt.replace(/\D/g,'');
alert(num1);
</script>
</head>
<body>
</body>
</html>Output:
\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.
Do comment if you have another code or any doubts on this tutorial.
Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version