How can I validate the range 1-99 using a regex?

Question

I need to validate some user input, to ensure a number entered is in the range of 1-99 inclusive. These must be whole (Integer) values

Preceeding 0 is permitted, but opt

Answer 1

This one worked for myself:

([1-9][0-9])|(0?[1-9])

It checks for 10-99 or 1-9 => 1-99 with one leading zero allowed