01.03 Matching Digits with a Character Class
Match any (single) digit you find in the range 0 through 9
[0-9]
Match Select Scope of Digits
[012789]
Match 10-digit North American Phone Number
[0-9][0-9][0-9]-[0-9][0-9][0-9]-[0-9][0-9][0-9][0-9]
Date: 2025/04/27