Question

I would like to know how to create a regex pattern in format:

111.222-3M

and

1112223M

What are numbers are only numbers allowed, and last one is a letter only.

Thx in advance.

Answer 1

A strict, case-sensitive version:

\d{3}\.?\d{3}-?\d[A-Z]

Will match 1112223M, 111.222-3M, 111.2223M and 111222-3M. If the last two are undesirable:

(\d{3}\d{3}\d[A-Z])|(\d{3}\.\d{3}-\d[A-Z])

Will match only the first two.