What regex can I use to validate a number between 0 and 255?

Question

I want to validate number in range of 0-255

I have this expression

\'/^([0-1]?[0-9]?[0-9])|([2][0-4][0-9])|(25[0-5])$/\'

But this a

Answer 1

[0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5]

will work