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i need a regular expression to validate only allow -1 and all other positive integers.any other negative value other than -1 is not allowed.
i’ve the following which only allow integers but need to allow -1 as well.plz help
^\d+$
Try
^(-1|[1-9]\d*)$?The reason for the
[1-9]\d*is to not allow 0 (because you said “positive integers”).If you want to allow 0 just do
^(-1|\d+)$.