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Regular Expression Details

Title Test Find Allow digits but exclude certain numbers
Expression
^(?!^(5|15|18|30)$)\d+$
Description
Because a regular expression only deals with a single character at a time it can be a challenge to work with numbers as they often contain multiple digits. This regex allows any number except the numbers in the list. It does this by using a negative look ahead to fail the regex if it finds an excluded number.
Matches
1 | 325 | 515 | 300
Non-Matches
5 | 15 | 18 | 30
Author Rating: Not yet rated. Matthew Harris
Source
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