! (disambiguation)

! is a punctuation mark, called an exclamation mark (33 in ASCII), exclamation point, ecphoneme, or bang.

! or exclamation point may also refer to:

Mathematics and computers

 * Factorial, a mathematical function
 * Derangement, a related mathematical function
 * Negation, in logic and some programming languages
 * Uniqueness quantification, in mathematics and logic
 * ! (CONFIG.SYS directive), usage for unconditional execution of directives in FreeDOS configuration files

Music

 * ! (The Dismemberment Plan album), released in 1995
 * ! (Donnie Vie album), released in 2016
 * "!" (The Song Formerly Known As), a single on the 1997 album Unit by Regurgitator
 * Exclamation Mark (album), a 2011 album by Jay Chou
 * Exclamation Point, a 2010 LP by DA!
 * ! (Trippie Redd album), released in 2019
 * ! (Trippie Redd song), that album's title track
 * ! (Cláudia Pascoal album), released in 2020

Other

 * ǃ, the IPA symbol for postalveolar click in speech
 * An indicator of a good chess move in punctuation
 * A dereference operator in BCPL