! (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), 1995
 * ! (Donnie Vie album), 2016
 * "!" (The Song Formerly Known As), a single on the album Unit by Regurgitator
 * Exclamation Mark (album), an album by Jay Chou
 * Exclamation Point LP, by DA!
 * ! (Trippie Redd album), 2019, or the title track
 * ! (Cláudia Pascoal album), 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