Regular Expressions 101

^start of line

Character Class[A-Z]+

+matches at least one character from the set below:

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

Character Class[a-z]+

+matches at least one character from the set below:

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

Character Class[\s]+

+matches at least one character from the set below:

\sa Unicode whitespace character

Character Class[a-z]+

+matches at least one character from the set below:

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

Character Class[\.!\?]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

$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

^[A-Z]+[a-z]+[\s]+[a-z]+[\.!\?]$

Test String
New

This is a sentence.
This is not a sentence
!This is not a sentence either
this is also not a sentence.
Is this a sentence?
Is THIS A SENTENCE too?
How       isthisasentence?

Regular Expression

Test StringNew

SubstitutionProcessing...

Test String
New

Substitution
Processing...