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!

From Wiktionary

Description

[change]

This symbol is called an "exclamation point" or an "exclamation mark".

Symbol

[change]

Symbol
!

  1. An exclamation mark used to show excitement, surprise or anger.
    Ouch! Help! I am hurt!
    Children's rhyme: "The interjection cries out: 'Hark! I need an exclamation mark!'"
    c.1649 A Fiery Flying Roll by Abiezer Coppe: "And now (my dearest ones!) every one under the Sun..."
  2. (symbol) Used by itself as a sign to make you notice something, such as something that is dangerous or something that has gone wrong.
  3. (computing) In computing, it usually represents a Boolean not.
    "if !x" means "if not x"
  4. (mathematics) factorial
    5! = 5 × 4 × 3 × 2 × 1
    "five factorial equals…"


Punctuation marks (edit)

apostrophe ( ' ) ( ) brackets ( [] ) braces ( {} ) colon ( : ) comma ( , ) dashes ( ) ( ) ellipsis ( ... ) exclamation mark ( ! ) hyphen ( ) ( - ) parentheses ( () ) period / full stop ( . ) question mark ( ? ) quotation marks ( ' ' ) ( " " ) semicolon ( ; ) slash ( / )


Other: ampersand ( & ) asterisk ( * ) at ( @ ) backslash ( \ ) bullet ( ) ( · ) degree ( ° ) number sign / pound sign ( # ) tilde ( ~ ) underscore ( _ ) vertical bar / pipe ( | )