Given a value I want to validate it to check if it is a valid year. My criteria is simple where the value should be an integer with 4
characters. I know this is not the best solution as it will not allow years before 1000
and will allow years such as 5000
. This criteria is adequate for my current scenario.
What I came up with is
\d{4}$
While this works it also allows negative values.
How do I ensure that only positive integers are allowed?
Years from 1000 to 2999
^[12][0-9]{3}$
For 1900-2099
^(19|20)\d{2}$