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ASCII (/ ˈæskiː / ⓘ ASS-kee), [3]: 6 an acronym for American Standard Code for Information Interchange, is a character encoding standard for electronic communication. ASCII codes represent text in computers, telecommunications equipment, and other devices.
Hexadecimal (also known as base-16 or simply hex) is a positional numeral system that represents numbers using a radix (base) of sixteen. Unlike the decimal system representing numbers using ten symbols, hexadecimal uses sixteen distinct symbols, most often the symbols "0"–"9" to represent values 0 to 9 and "A"–"F" to represent values from ten to fifteen.
In HTML and XML, a numeric character reference refers to a character by its Universal Character Set / Unicode code point, and uses the format: &#xhhhh; or. &#nnnn; where the x must be lowercase in XML documents, hhhh is the code point in hexadecimal form, and nnnn is the code point in decimal form. The hhhh (or nnnn) may be any number of ...
The Supplemental Mathematical Operators block (U+2A00–U+2AFF) contains various mathematical symbols, including N-ary operators, summations and integrals, intersections and unions, logical and relational operators, and subset/superset relations. Supplemental Mathematical Operators [1] Official Unicode Consortium code chart (PDF) 0.
The format is the same as for any entity reference: &name; where name is the case-sensitive name of the entity. The semicolon is required. Because numbers are harder for humans to remember than names, character entity references are most often written by humans, while numeric character references are most often produced by computer programs. [1]
A computer number format is the internal representation of numeric values in digital device hardware and software, such as in programmable computers and calculators. [1] Numerical values are stored as groupings of bits, such as bytes and words. The encoding between numerical values and bit patterns is chosen for convenience of the operation of ...
However, numeric entry of Unicode characters is possible in most Unix or Unix-like OSs by pressing and releasing Ctrl + ⇧ Shift + U, and typing the hex number followed by the space bar or enter key. For example, For the registered trademark symbol ®, type Ctrl + ⇧ Shift + U, AE, ↵ Enter. For the no entry sign ⛔, type Ctrl + ⇧ Shift ...
Plane (Unicode) In the Unicode standard, a plane is a contiguous group of 65,536 (2 16) code points. There are 17 planes, identified by the numbers 0 to 16, which corresponds with the possible values 00–10 16 of the first two positions in six position hexadecimal format (U+ hhhhhh). Plane 0 is the Basic Multilingual Plane (BMP), which ...