Regular expression numbers with dots and commas

Question

I would need a regular expression that treats numbers with dots and commas the same way. Commas should not be treated as thousand separators.

Example:
9.8
9,8

should return 9.8 both

I tried this, but it doesn't work.

^(\d+(?:[\.\,]\d{2})?|)$

Yes I tried this, but it doesn't work. ^(\d+(?:[\.\,]\d{2})?|)$ — user3583805, Apr 29 '14 at 05:13
By the way , which language so we can give specific example. — Poomrokc The 3years, Apr 29 '14 at 05:16
Most languages have functions for handling number localizations, are you sure you need regex for this? — Mike Brant, Apr 29 '14 at 05:31

score 1 · Answer 1 · answered Apr 29 '14 at 11:21

1

Your regex ^(\d+(?:[\.\,]\d{2})?|)$ matches numbers that have exactly 2 decimals, if you want to match any number (1 or more) of decimals, use:

^(?:\d+(?:[.,]\d+)?|)$

answered Apr 29 '14 at 11:21

Toto

score 0 · Answer 2 · answered Apr 29 '14 at 05:25

0

try this :

^(\d*[.,]?\d*)*$

answered Apr 29 '14 at 05:25

aelor

score 0 · Answer 3 · answered Apr 29 '14 at 05:28

PHP

$re = '/(,)/mx'; 
$str = '9.8 \n9,8'; 
$subst = '.'; 
preg_replace($re, $subst, $str);

JAVASCRIPT

var re = /(,)/gmx; 
var str = '9.8 \n9,8';
var subst = '.'; 
str.replace(re, subst);

PYTHON

import re
p = re.compile(r'(,)', re.MULTILINE | re.VERBOSE)
str = "9.8 \n9,8"
subst = "." 
re.sub(p, subst, str)

3 Answers3