Big-endian
Big-endian is an ordering convention in which the most significant byte or component of a multibyte value comes before its less significant components.
Quantum Programming in Depth
Big-endian encoding orders a bit string or composite value with its most significant bit or component first.
- How it is used
- Aligns basis-state, matrix, control-pattern, and measurement representations when quantum programs convert bit strings and integers.
- How deep it goes
- Defines integer mapping and traces its implementation consequences for matrices, Q# controls, and Qiskit readout without deriving a general conversion algorithm.
- Examples
- Uses |01⟩ integer mappings, Q# reversed control arrays, deterministic Qiskit readout tests, and two-bit phase estimation.
- What you can do after
- Diagnose/debug ordering mismatches by matching integer, bit-string, qubit-array, and measurement conventions.
Latency
A byte order that stores the most significant byte of a multi-byte value first and the least significant byte last.
- How it is used
- Defines byte ordering for multi-byte values in memory, serialization formats, and network communication.
- How deep it goes
- Explains byte layouts for 32-bit integers and links them to serialization, but does not provide implementation code.
- Examples
- Uses 0xE011CFD0 and its byte sequence to contrast big-endian with little-endian representation.
- What you can do after
- Evaluate byte sequences and recognize when network or serialized data uses big-endian order.
Related concepts
- Q#used by · Q# is Microsoft's domain-specific programming language for expressing quantum algorithms and operations.
- endiannesskind of · Endianness is the convention that determines the order in which the bytes of a multibyte value are represented in memory or a serialized form.
- little-endiancontrasts with · Little-endian is a byte-order convention in which the least significant byte of a multibyte value comes first, at the lowest address or earliest position.
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