Question

I’m using this /[-\+,\.0-9]+/ to match numbers in strings like +4400,00 % or -3500,00 % or 0.00 %.

The matched results I want is +4400,00 and I correctly get it.

What if I wanted the same results for a string like +4.400,00 % (dot for thousands) ?

EDIT

How do I have to modify my RegEx for matching numbers in strings like <font color="red">+44.500 %</font>?

Answer 1

/[\-\+]?\s*[0-9]{1,3}(\.[0-9]{3})*,[0-9]+/

That should cover strings that

• may start with a + or -, and then perhaps some whitespaces
• then have between one and three numbers
• then have groups of three numbers, prefixed with a period
• then have a comma and at least one number behind the comma

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Regarding your additional question (matching numbers inside strings), you should look into the manual of whatever regex API you’re using. Most APIs have separate search and match methods; match wants the whole string to be part of your regular expression’s language, while search will also match substrings.