CODEWITHSUNDEEP
asp.netregex
peroija
peroija

Reputation: 1982

regular expression to allow only specific numbers

I am looking to have a regular expression that allows only specific numbers to be entered, e.g. 2,4,5,6,10,18

I tried something like 

"'2'|'4'|'5'|'6'|'10'|'18'"

and anything that i typed failed the regex and then the computer pointed its finger at me and laughed.

where am i going wrong?

Upvotes: 4

Views: 11851

Answers (1)

Heinzi
Heinzi

Reputation: 172220

The single quotes are unnecessary. The regex you are looking for is: ^(2|4|5|6|10|18)$.

The symbols ^ and $ denote the start and the end of the line, to prevent 121 from matching (since it contains 2).

Upvotes: 8

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