Wikipedia
--
--, a string of two hyphen-minus characters or - -, may approximate or refer to the following things:
- En dash (–)
- Em dash (—) as a typewriter approximation
- Sig dashes (-- ), the email and Usenet signature delimiter
- For Unix commands, -- is 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, -- is commonly used in programming languages
- Emoticon