--, a string of two hyphen-minus characters or - -, may approximate or refer to: * En dash (–) * Em dash (—), as a typewriter approximation *

Sig dashes A signature block (often abbreviated as signature, sig block, sig file, .sig, dot sig, siggy, or just sig) is a personalized block of text automatically appended at the bottom of an email message, Usenet article, or forum post. Email and Usenet ...

(--), the email and Usenet signature delimiter * For

Unix command This is a list of Unix commands as specified by IEEE Std 1003.1-2008, which is part of the Single UNIX Specification (SUS). These commands can be found on Unix operating systems and most Unix-like operating systems. List See also * List of G ...

s, used as a prefix for command options. By itself, it typically means the end of command options. * Decrement operator in some programming languages *

Inline comment This comparison of programming languages compares the features of language syntax (format) for over 50 computer programming languages. Expressions Programming language expressions can be broadly classified into four syntax structures: ;pre ...

s, commonly used in programming languages *

Emoticon An emoticon (, , rarely , ), short for "emotion icon", also known simply as an emote, is a pictorial representation of a facial expression using characters—usually punctuation marks, numbers, and letters—to express a person's feelings, ...

, a pictorial representation of a facial expression in characters