Check if number in string with regex

Question

My regex knowledge is strictly limited, but I need to use it to check a string for a specific number, e.g.

12345 123543 123222 4124214 2323 42124 23123 24444 34342

How can I use regex to confirm whether 2323 is in the above string?

Basically, if the string contains the number, for my project, then the string and the number are a match. If this isn't clear, please let me know and I'll try to expand.

Does it have to match a full number? For example, is 4444 in your example string? — hammar
– hammar, Commented May 16, 2013 at 0:38

tckmn · Accepted Answer · 2013-05-16 00:35:55Z

4

The regex for checking if 2323 is in the string is:

.*\b2323\b.*

This means anything, then 2323, then anything. The \bs will make sure that the 2323 is not in the middle of a number, but its own number. (Without the \b word boundaries, the regex would match 83523238 because it has 2323 in it.)

answered May 16, 2013 at 0:35

tckmn

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2 Comments

James Mathieson Over a year ago

That's great, thank you very much, will it ensure that spaces are used to separate numbers in the string? As I can't allow 2323 to match 152323 etc

tckmn Over a year ago

@JeremyHewitt That's why the \bs are there

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