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hexadecimal    
十六进制

十六进制

hexadecimal
十六进位

hexadecimal
十六进

hexadecimal
adj 1: of or pertaining to a number system having 16 as its base
[synonym: {hexadecimal}, {hex}]

(Or "hex") {Base} 16. A number representation
using the digits 0-9, with their usual meaning, plus the
letters A-F (or a-f) to represent hexadecimal digits with
values of (decimal) 10 to 15. The right-most digit counts
ones, the next counts multiples of 16, then 16^2 = 256, etc.

For example, hexadecimal BEAD is decimal 48813:

digit weight value
B = 11 16^3 = 4096 11*4096 = 45056
E = 14 16^2 = 256 14* 256 = 3584
A = 10 16^1 = 16 10* 16 = 160
D = 13 16^0 = 1 13* 1 = 13
-----
BEAD = 48813

There are many conventions for distinguishing hexadecimal
numbers from decimal or other bases in programs. In {C} for
example, the prefix "0x" is used, e.g. 0x694A11.

Hexadecimal is more succinct than {binary} for representing
{bit-masks}, machines addresses, and other low-level constants
but it is still reasonably easy to split a hex number into
different bit positions, e.g. the top 16 bits of a 32-bit word
are the first four hex digits.

The term was coined in the early 1960s to replace earlier
"sexadecimal", which was too racy and amusing for stuffy
{IBM}, and later adopted by the rest of the industry.

Actually, neither term is etymologically pure. If we take
"binary" to be paradigmatic, the most etymologically correct
term for base ten, for example, is "denary", which comes from
"deni" (ten at a time, ten each), a Latin "distributive"
number; the corresponding term for base sixteen would be
something like "sendenary". "Decimal" is from an ordinal
number; the corresponding prefix for six would imply something
like "sextidecimal". The "sexa-" prefix is Latin but
incorrect in this context, and "hexa-" is Greek. The word
{octal} is similarly incorrect; a correct form would be
"octaval" (to go with decimal), or "octonary" (to go with
binary). If anyone ever implements a base three computer,
computer scientists will be faced with the unprecedented
dilemma of a choice between two *correct* forms; both
"ternary" and "trinary" have a claim to this throne.

[{Jargon File}]

(1996-03-09)


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英文字典中文字典相关资料:


  • Hexadecimal - Wikipedia
    Hexadecimal (also known as base-16 or simply hex) is a positional numeral system that represents numbers using a radix (base) of sixteen
  • Hexadecimal to Decimal converter - RapidTables. com
    Hex to decimal number converter and how to convert Base 16 to base 10
  • Hexadecimal Number System - GeeksforGeeks
    The Hexadecimal Number System is a base-16 number system used in diverse fields, especially in computing and digital electronics It consists of 16 symbols, including numbers 0 to 9 and letters A to F, offering a compact way to represent binary-coded values
  • Hex Calculator
    This free hex calculator can add, subtract, multiply, and divide hexadecimal values, as well as convert between hexadecimal and decimal values
  • Hexadecimals - Math is Fun
    A hexadecimal number is based on the number 16 16 Different Values There are 16 hexadecimal digits They are the same as the decimal digits up to 9, but then there are the letters A, B, C, D, E and F in place of the decimal numbers 10 to 15:
  • Hexadecimal Number System Table - BYJUS
    The hexadecimal number system is a type of number system, that has a base value equal to 16 It is also pronounced sometimes as ‘hex’ Hexadecimal numbers are represented by only 16 symbols These symbols or values are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E and F Each digit represents a decimal value For example, D is equal to base
  • Hexadecimal - SparkFun Learn
    Hexadecimal -- also known as hex or base 16 -- is a system we can use to write and share numerical values In that way it's no different than the most famous of numeral systems (the one we use every day): decimal





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