Regex to match 0 - 999 but not blank

Posted by James Cadd on Stack Overflow See other posts from Stack Overflow or by James Cadd
Published on 2010-06-18T15:53:49Z Indexed on 2010/06/18 16:03 UTC
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regex

I'm working on a regex to match valid integer numbers such as the following:

0
1
99
999

However it should not allow matching an empty string. The closest I can get is:

(0)|\\d{1,3}

Which to me says a matching string will have either a zero or a series of digits between 1 and 3 characters long. However, empty strings still appear to match this pattern. What's the proper way to exclude empty strings from this regex?

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Regex to match 0 - 999 but not blank - Developer IT

Regex to match 0 - 999 but not blank

regex

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