! is a punctuation mark, called an exclamation mark, 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
  • <code>!</code>, a CONFIG.SYS directive in FreeDOS for unconditional execution of directives
  • A dereference operator in BCPL

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 chess annotation

See also

  • !! (disambiguation)
  • !!! (disambiguation)
  • Interrobang, the nonstandard mix of a question mark and an exclamation mark
  • ḷ, not the exclamation mark, but a lower-case letter Ḷ used in Asturian