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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. For a far more comprehensive list of symbols and signs, see List of Unicode characters.
It is decidable whether a given grammar is a regular grammar, [f] as well as whether it is an LL grammar for a given k≥0. [26]: 233 If k is not given, the latter problem is undecidable. [26]: 252 Given a context-free grammar, it is not decidable whether its language is regular, [27] nor whether it is an LL(k) language for a given k.
where A, B, and C are nonterminal symbols, the letter a is a terminal symbol (a symbol that represents a constant value), S is the start symbol, and ε denotes the empty string. Also, neither B nor C may be the start symbol , and the third production rule can only appear if ε is in L ( G ), the language produced by the context-free grammar G .
To use alt key codes for keyboard shortcut symbols you’ll need to have this enabled. If you’re using a laptop, your number pad is probably integrated to save space. ... Adding accents to ...
The members of R are called the rules or productions of the grammar. S is the start variable (or start symbol), used to represent the whole sentence (or program). It must be an element of V. It is common to list all right-hand sides for the same left-hand side on the same line, using | (the pipe symbol) to separate them.
This page lists codes for keyboard characters, the computer code values for common characters, such as the Unicode or HTML entity codes (see below: Table of HTML values"). There are also key chord combinations, such as keying an en dash ('–') by holding ALT+0150 on the numeric keypad of MS Windows computers.
Some websites do not allow typographic quotation marks or apostrophes in posts. One can skirt these limitations, however, by using the HTML character codes or entities [43] or the other key combinations in the following table. In Windows, AutoHotkey scripts can be used to assign simpler key combinations to opening and closing quotation marks.
Punctuation marks are marks indicating how a piece of written text should be read (silently or aloud) and, consequently, understood. [1] The oldest known examples of punctuation marks were found in the Mesha Stele from the 9th century BC, consisting of points between the words and horizontal strokes between sections.