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In many programming languages, the vertical bar is used to designate the logic operation or, either bitwise or or logical or. Specifically, in C and other languages following C syntax conventions, such as C++ , Perl , Java and C# , a | b denotes a bitwise or ; whereas a double vertical bar a || b denotes a ( short-circuited ) logical or .
The vertical bar (or colon) is a separator that can be read as "such that", "for which", or "with the property that". The formula Φ(x) is said to be the rule or the predicate. All values of x for which the predicate holds (is true) belong to the set being defined.
Vertical bar | or vertical bars ‖ are typographical symbols. They may also refer to: Chōonpu, a character in vertical Japanese writing, ー; Dental click, ǀ; Lateral clicks, a character in African languages, ǁ; parallelism, ∥; parallel operator, also ∥; logical OR, || in several programming languages
On some terminals, these characters are not available at all, and the complexity of the escape sequences discouraged their use, so often only ASCII characters that approximate box-drawing characters are used, such as - (hyphen-minus), | (vertical bar), _ , = and + in a kind of ASCII art fashion.
Combining Vertical Line Above U+030E ̎: 782: Combining Double Vertical Line Above U+030F ̏: 783: Combining Double Grave Accent U+0310 ̐: 784: Combining Candrabindu U+0311 ̑: 785: Combining Inverted Breve U+0312 ̒: 786: Combining Turned Comma Above U+0313 ̓: 787: Combining Comma Above U+0314 ̔: 788: Combining Reversed Comma Above U+0315
The GSTrans string processing API on the operating systems for the Acorn Atom and the BBC Micro, and on RISC OS for the Acorn Archimedes and later machines, use the vertical bar character | in place of the caret. For example, |M (pronounced "control em", the same as for the ^M notation) is the carriage return character, ASCII 13.
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On Microsoft Windows systems, the normal colon (:) after a device letter has sometimes been replaced by a vertical bar (|) in file URLs. This reflected the original URL syntax, which made the colon a reserved character in a path part. Since Internet Explorer 4, file URIs have been standardized on Windows, and should follow the following scheme ...