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In logic, a set of symbols is commonly used to express logical representation. The following table lists many common symbols, together with their name, how they should be read out loud, and the related field of mathematics .
Miscellaneous Symbols is a Unicode block (U+2600–U+26FF) containing glyphs representing concepts from a variety of categories: astrological, astronomical, chess, dice, musical notation, political symbols, recycling, religious symbols, trigrams, warning signs, and weather, among others.
In Pascal, @ is the "address of" operator (it tells the location at which a variable is found). In Perl, @ prefixes variables which contain arrays @array, including array slices @array[2..5,7,9] and hash slices @hash{'foo', 'bar', 'baz'} or @hash{qw(foo bar baz)}. This use is known as a sigil.
As formulas are entirely constituted with symbols of various types, many symbols are needed for expressing all mathematics. The most basic symbols are the decimal digits (0, 1, 2, 3, 4, 5, 6, 7, 8, 9), and the letters of the Latin alphabet .
Typographical symbols and punctuation marks are marks and symbols used in typography with a variety of purposes such as to help with legibility and accessibility, or to identify special cases. This list gives those most commonly encountered with Latin script .
As of Unicode version 15.1, there are 149,878 characters with code points, covering 161 modern and historical scripts, as well as multiple symbol sets. This article includes the 1,062 characters in the Multilingual European Character Set 2 ( MES-2) subset, and some additional related characters.
the Keyboard Viewer, which can be used to view and input characters accessed via the ⌥ Option key; the Character Viewer, which can be used to access any Unicode character. It is also available from the Special Characters tool; Linux. Select, copy, and paste the character using the GNOME Character Map. If not already installed along with GNOME ...
In the plain TeX markup language, the ampersand is used to mark tabstops. The ampersand itself can be applied in TeX with \&. The Computer Modern fonts replace it with an "E.T." symbol in the cmti# (text italic) fonts, so it can be entered as {\it\&} in running text when using the default (Computer Modern) fonts.
Unicode has subscripted and superscripted versions of a number of characters including a full set of Arabic numerals. These characters allow any polynomial, chemical and certain other equations to be represented in plain text without using any form of markup like HTML or TeX.
There are a variety of Unicode bullet characters, including: U+2022 • BULLET (•, •) U+2023 ‣ TRIANGULAR BULLET; U+2043 ⁃ HYPHEN BULLET (⁃) U+204C ⁌ BLACK LEFTWARDS BULLET; U+204D ⁍ BLACK RIGHTWARDS BULLET; U+2219 ∙ BULLET OPERATOR for use in mathematical notation primarily as a dot product instead of interpunct.