0xA55

0xA55 is a hexadecimal literal commonly used in programming and digital notation. The prefix 0x signals that the value that follows is expressed in base 16 rather than base 10. The sequence A55 consists of the hexadecimal digits A, 5, and 5.

The decimal value of 0xA55 is 2645, and in binary it is 1010 0101 0101. The three hex digits can be interpreted as a compact numeric constant in code, often used in tests, demonstrations, or as a small offset, mask, or identifier in low-level contexts.

In software development, 0xA55 may appear in source code as an integer constant assigned to a variable or used in expressions. It can serve various roles such as a bit mask, an opcode placeholder in examples, or a small index. In debugging or disassembly tasks, values like 0xA55 commonly appear when inspecting memory, registers, or immediate operands.

As a standalone identifier, 0xA55 does not carry standardized meaning beyond its numeric value and the context in which it appears. It is not a formal address in modern 32-bit or 64-bit architectures, though it could represent a short offset or part of a larger address in certain data dumps or specialized formats.

In Unicode discussions, code points are denoted with U+ followed by hexadecimal digits; while hex literals like 0xA55 share related notation, they are not directly interchangeable with a specific character without the appropriate code point context.

See also: hexadecimal, binary, memory addressing, bit masking.