Hexadecimal number
A hexadecimal number is a numeral represented in the base-sixteen positional system using symbols 0–9 and A–F for values zero through fifteen.
Modern C
A hexadecimal format is a numeric output representation using base-16 digits and, when applicable, a hexadecimal prefix.
- How it is used
- Uses hexadecimal constants for nonnegative values and hexadecimal output for inspecting bit patterns.
- How deep it goes
- Explains notation, digit patterns, constant typing, negative-value pitfalls, and printf conversion, without developing arithmetic algorithms.
- Examples
- Uses `0x7FFF`, `0x8000`, `0xFFFFFFFF`, `%x`, and a table mapping hexadecimal digits to four-bit patterns.
- What you can do after
- Apply it via C literal syntax and printf formats while recognizing unsigned interpretation and four-bit digit patterns.
Modern C, Third Edition
A hexadecimal format represents a value using base-sixteen digits.
- How it is used
- Specifies C integer constants and presents unsigned bit patterns compactly during formatted output.
- How deep it goes
- Defines integer and floating-point syntax, digit values, bit mappings, and printf choices without developing arithmetic algorithms.
- Examples
- Uses 0xbeaf, 0x7FFF'FFFF, hexadecimal digit patterns, and %x output as concrete examples.
- What you can do after
- Apply it via C literals and printf formats to write, interpret, and display integer bit patterns.
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Acing the CCNA Exam: Volume 1 Fundamentals and Protocols
The hexadecimal number system is a base-16 positional numeral system using the digits 0 through 9 and the letters A through F.
- How it is used
- Represents MAC addresses and IPv6 addresses in a compact, human-readable form.
- How deep it goes
- Defines base 16 and works through binary conversions, stopping short of broader arithmetic operations.
- Examples
- Uses MAC address notation, IPv6 groups, conversion examples, and decimal-binary-hexadecimal tables.
- What you can do after
- Apply three-step procedures to convert between binary and hexadecimal values.
Read how Acing the CCNA Exam: Volume 1 Fundamentals and Protocols explains hexadecimal number →
Web Design Playground, Second Edition
A hexadecimal number is a numeral written in base 16 using digits 0 through 9 and letters A through F.
- How it is used
- Uses hexadecimal numbers to specify RGB colors efficiently in CSS.
- How deep it goes
- Explains base-16 symbols, two-digit place values, conversions, RGB structure, alpha notation, and shorthand without pursuing broader number-system theory.
- Examples
- Uses 10 hex, 5C hex, purple #800080, common color codes, and shorthand #3366cc/#36c.
- What you can do after
- Apply hexadecimal values to write CSS RGB color codes and recognize equivalent three-digit shorthand.
Read how Web Design Playground, Second Edition explains hexadecimal number →
Rust in Action: Systems programming concepts and techniques
Hexadecimal notation is a base-16 positional numeral system that represents values using sixteen distinct digits.
- How it is used
- Uses hexadecimal to write Rust integers, format numeric output, inspect bytes, and program a simple CPU directly.
- How deep it goes
- Explains base-16 conversion, Rust syntax, byte coverage, and practical output, then stops short of a comprehensive numeral-system reference.
- Examples
- Demonstrates 0x12C for 300, Rust formatting, fview output, byte markers, and a CHIP-8 program written directly in hexadecimal.
- What you can do after
- Apply it via Rust literals and formatting, inspect file bytes with a hexdump, and understand hexadecimal CPU programs.
Read how Rust in Action: Systems programming concepts and techniques explains hexadecimal number →
Related concepts
- IPv6used by · IPv6 is the sixth version of the Internet Protocol, using 128-bit network addresses for packet-based communication.
- cryptographic hashused by · A cryptographic hash is a fixed-length digest computed from input data by a deterministic function designed to resist preimage, second-preimage, and collision attacks.
- decimal numeral systemequivalent to · The decimal numeral system is a base-ten positional numeral system that represents values using the digits 0 through 9.
- mac addressuses · A MAC address is a link-layer identifier assigned to a network interface for communication over a local network link.
- literalkind of · A literal is a language construct that directly denotes a fixed value or specifies an exact value permitted by a type.
- JavaScriptused by · JavaScript is a high-level, dynamically typed, multi-paradigm programming language standardized as ECMAScript and used for web and general-purpose programming.
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