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Download as PDF; Printable version; In other projects Wikidata item; ... Use of the letter x for an independent variable or unknown value. See History of algebra: The ...
HTML and XML provide ways to reference Unicode characters when the characters themselves either cannot or should not be used. A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name. A numeric character reference uses the ...
The Adobe Glyph List (AGL) is a mapping of 4,281 glyph names to one or more Unicode characters. Its purpose is to provide an implementation guideline for consumers of fonts (mainly software applications); it lists a variety of standard names that are given to glyphs that correspond to certain Unicode character sequences.
The "escape" character (ESC, code 27), for example, was intended originally to allow sending of other control characters as literals instead of invoking their meaning, an "escape sequence". This is the same meaning of "escape" encountered in URL encodings, C language strings, and other systems where certain characters have a reserved meaning.
A stylistic depiction of values inside of a so-named comma-separated values (CSV) text file. The commas (shown in red) are used as field delimiters. A delimiter is a sequence of one or more characters for specifying the boundary between separate, independent regions in plain text, mathematical expressions or other data streams.
[13] [14] For example, () denotes the function (), and (,,) denotes a partial application, where the first two arguments are given and the third argument shall take any valid value on its domain. The bullet operator , ∙ , U+2219, is sometimes used to denote the "AND" relationship in formal logic .
An HTML numeric character reference is of the form &#D; or &#xH;; D and H are the character’s Unicode code point in decimal and hexadecimal. For example, either — or — can be entered to give U+2014, em dash (—). Because a character’s Unicode code point is usually given in hexadecimal with a prefixed "U+", the hexadecimal code ...
Some character sets provide a separate newline character code. EBCDIC, for example, provides an NL character code in addition to the CR and LF codes. Unicode, in addition to providing the ASCII CR and LF control codes, also provides a "next line" (NEL) control code, as well as control codes for "line separator" and "paragraph separator" markers.