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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.
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.
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.
Many special characters (those not on the standard computer keyboard) are useful—and sometimes necessary—in Wikipedia articles. Even articles that use only English words may use punctuation such as an em dash (—), and symbols such as a section sign (§) or registered mark (®).
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 subset, and some additional related characters.
1. like, as, according to, inasmuch as, since, as well as, together with; all adverbial forms, some as a segue; 2. early forms use other hieroglyphs; 3. Egyptian: mjtj and mjtt relate to "image" or "likeness": likeness, copy, resemblance, statue, image, similitude, the like etc. 𓏈.
Chess symbols are part of Unicode. Instead of using images, one can represent chess pieces by characters that are defined in the Unicode character set. This makes it possible to: Use figurine algebraic notation, which replaces the letter that stands for a piece by its symbol, e.g. ♘c6 instead of Nc6.
The ampersand can be used to indicate that the "and" in a listed item is a part of the item's name and not a separator (e.g. "Rock, pop, rhythm & blues and hip hop"). The ampersand may still be used as an abbreviation for "and" in informal writing regardless of how "and" is used.