Regular Expressions 101

Positive Lookbehind(?<=^..)

^start of line

.any character (except for line terminators)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?<=^..).

New

ABCDEF => C
123456 => 3
A B C