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--, a string of two hyphen-minus characters or - -, may approximate or refer to:

  • En dash (–)
  • Em dash (—), as a typewriter approximation
  • Sig dashes (--), the email and Usenet signature delimiter
  • For Unix commands, used as a prefix for command options. By itself, it typically means the end of command options.
  • Decrement operator in some programming languages
  • Inline comments, commonly used in programming languages
  • Emoticon, a pictorial representation of a facial expression in characters

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