How To Ignore An Character With Random Numbers Using RegEx?

Question

I am trying to ignore the character @ with random numbers combined using RegEx.

This is what I don't want to detect:
@1235

This is what I want to detect:
12345

This what I did so far:

(?!@[0-9])([0-9])

Answer 1

You can use

(?<![@\d])\d+

See the regex demo. Details:

• (?<![@\d]) - a negative lookbehind that fails the match if there is a @ or a digit immediately to the left of the current location
• \d+ - one or more digits.

See the regex graph: