Need a regular expression - disallow all zeros

Question

I want to validate a string to meet the following conditions:

• Must be 6 characters long
• Only the first character can be alpha-numeric the rest must be

Answer 1

This is Correct Answer Of this Regex

[O]{1}((?!0+$)[0-9]{1,5})

If you are work with specific Ids. so you must use that

Ex. 1. O0 -- Reject 2. O00 -- Reject 3. O00000 -- Reject 4. O1 -- Success 5. O01 -- success