--, a string of two

hyphen-minus The symbol , known in Unicode as hyphen-minus, is the form of hyphen most commonly used in digital documents. On most keyboards, it is the only character that resembles a minus sign or a dash, so it is also used for these. The name ''hyphen-mi ...

characters, may approximate or refer to: *

En dash The dash is a punctuation mark consisting of a long horizontal line. It is similar in appearance to the hyphen but is longer and sometimes higher from the baseline. The most common versions are the endash , generally longer than the hyphen ...

(–) *

Em dash The dash is a punctuation mark consisting of a long horizontal line. It is similar in appearance to the hyphen but is longer and sometimes higher from the baseline. The most common versions are the endash , generally longer than the hyphen ...

(—), 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-like operating system commands, used as a prefix for

long option A command-line interface (CLI) is a means of interacting with software via commands each formatted as a line of text. Command-line interfaces emerged in the mid-1960s, on computer terminals, as an interactive and more user-friendly alternativ ...

s. By itself, it typically means the end of command options. * The

decrement operator Increment and decrement operators are unary operators that increase or decrease their operand by one. They are commonly found in imperative programming languages. C-like languages feature two versions (pre- and post-) of each operator with s ...

in some programming languages *

Inline comment This article compares the syntax of many notable programming languages. Expressions Programming language expressions can be broadly classified into four syntax structures: ;prefix notation * Lisp (* (+ 2 3) (expt 4 5)) ;infix notation * F ...

s in some programming languages

See also