Regular Expressions 101

Pro

1st Alternative^[^a-zA-Z\n]+

^start of line

Negated Character Class[^a-zA-Z\n]+

+matches at least one character outside the set below:

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

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

\na line-feed (newline) character (ASCII 10)

2nd Alternative[^a-zA-Z\n]+$

Negated Character Class[^a-zA-Z\n]+

+matches at least one character outside the set below:

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

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

\na line-feed (newline) character (ASCII 10)

$end of line

3rd Alternative[^a-zA-Z\s]+

Negated Character Class[^a-zA-Z\s]+

+matches at least one character outside the set below:

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

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

\sany whitespace character

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.

25 tokens

^[^a-zA-Z\n]+|[^a-zA-Z\n]+$|[^a-zA-Z\s]+

New

Hi, you!
  No under_score!
 *   rem punct then spaces

Hi, you!
  No under_score!
 *   rem punct then spaces