Regular Expressions 101

^start of line

Non-Capturing Group(?:\d+\.|[a-zA-Z ])*

*repeats the group contents below any number of times:

1st Alternative\d+\.

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

2nd Alternative[a-zA-Z ]

Character Class[a-zA-Z ]

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

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

the literal (32₁₀ / 40₈ / 20₁₆)

$end of line

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

^(?:\d+\.|[a-zA-Z ])*$

New

            -> Match
Foo
Foo Bar
Foo 1. Bar
Foo 11. Bar
1. Foo 11. Bar
      -> No Match
Foo 1 Bar