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 is the simplest possible, I can think of:

^([1-9][0-9]?)$

Allows only 1-99 both inclusive.