--

Double dash the video game Mario Kart: Double Dash --, a string of two hyphen-minus characters, may approximate or refer to: Em dash (—), as a typewriter approximation Sig dashes (--), the email and Usenet signature delimiter The letter 'M' in Morse code A prefix for long options in Unix-like operating system commands; by itself, it typically means the end of command options The decrement operator in some programming languages Inline comments in some programming languages See also -- --- (disambiguation) (three hyphens) Double hyphen (one above the other) dash (–) HTML comment tag wrappers, <!-- and --> Horizontal rule, which is represented by ---- in MediaWiki markup