hexadecimal notation
Definition
Noun: A system for representing numbers that uses sixteen distinct symbols as its base. These symbols are typically the digits 0–9 to represent values zero to nine, and the letters A–F (or a–f) to represent values ten to fifteen. It is a positional numeral system where each digit's value is multiplied by a power of sixteen.
Usage
Hexadecimal notation is primarily used in computing and digital electronics because it provides a more human-friendly representation of binary-coded values. One hexadecimal digit cleanly represents four binary digits (bits), or a nibble.
Examples
- The decimal number is written as in hexadecimal notation.
- Memory addresses are often displayed using hexadecimal notation, such as .
- In CSS, colors are frequently defined with hexadecimal notation, like for white.
Advanced Usage
- Prefixes and Indicators: To avoid confusion with decimal numbers, hexadecimal numbers are often prefixed with indicators like (common in programming, e.g., ), (in some older systems), or a subscript (e.g., ).
- Bitwise Representation: It is fundamental for low-level programming, debugging, and examining raw data where direct binary would be too lengthy.
Variants and Related Words
- Hexadecimal (adj): Of, relating to, or using a base-16 number system. (e.g., , ).
- Hex (n, informal): A common abbreviation for a hexadecimal number. (e.g., ).
- Binary Notation: A notation system using two symbols (0 and 1).
- Decimal Notation: A notation system using ten symbols (0–9).
Synonyms
- Base-16 notation
- Hex notation
Related Phrases
- Hex digit: A single symbol (0-9, A-F) used in hexadecimal notation.
- Hex code: Often refers to a value, especially a color value, expressed in hexadecimal notation.
Noun
-
any notation that uses 16 different characters
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