Regular Expression to match 0, 10, 20, 30, 40 or 50

[Ben]

Is it possible for a regular expression to validate whether a number
is equal to 0, 10, 20, 30, 40 or 50? If so, do you know the syntax?

[Accmailer]

simple!
[1-5]?0
that means one optional digit ranging from 1 to 5 followed by an
obligatory zero

while this would be the same (1|2|3|4|5)?0

as a precaution you may add
1)optional spaces...
\s*[1-5]?0\s*

and
2) start of input and end of input anchors
^\s*[1-5]?0\s*$

[Ben]

Yep, very simple! Thanks very much!

> > is equal to 0, 10, 20, 30, 40 or 50? If so, do you know the syntax?- Hide quoted text -
>
> - Show quoted text -