Regular Expressions 101

^start of string

.*any character (except for line terminators), repeated any number of times

Group 1([A-Za-z])

Character Class[A-Za-z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

.*any character (except for line terminators), repeated any number of times

\1the text saved by group 1

.*any character (except for line terminators), repeated any number of times

$end of string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^.*([A-Za-z]).*\1.*$

New

Ksnnsn