Question

I’m really bad at regex and was wondering if anyone could help me with this. I need to accept a value where $,€, and £ are allowed but not required with a min 5.00 (.00 is not required but is allowed) and 2,000 ( comma is not required but is allowed).

Some examples of valid inputs

$5
€5
£5
$5.00
5
1000
1,000
1,000.00

Answer 1

If you want to allow values like £5.32:

^[$€£]?(\d+([\.,]\d{2})?)$

If not:

^[$€£]?(\d+([\.,]00)?)$

Once you’ve checked whether it’s formatted correctly using the regex, you can go on to check whether 5 < int(value) < 2000 using the first returned group of the regex.

EDIT: Having thought about it, here’s a regex which will take care of the bounding too:

^[$€£]?((([1-5],?)?\d{2,3}|[5-9])(\.\d{2})?)$