0xF1

0xF1 is a hexadecimal numeric literal used in many programming languages to denote a specific integer value. In base-16 notation, the digits F and 1 correspond to decimal values 15 and 1, so 0xF1 equals 15 × 16 + 1 = 241. In binary, this value is 11110001. The prefix 0x is conventionally used in languages such as C, C++, JavaScript, Python, and many others to indicate hexadecimal notation.

In character encoding contexts, the byte value 0xF1 commonly represents the character ñ in ISO-8859-1 (Latin-1) and maps to the Unicode code point U+00F1. In Unicode, U+00F1 is the character ñ. When encoding the same character in UTF-8, it is represented by the two-byte sequence 0xC3 0xB1 rather than a single 0xF1. Thus, 0xF1 as a byte can carry different meanings depending on the encoding scheme in use.

In x86 assembly and machine code, 0xF1 is also the opcode for the ICEBP instruction (also referred to as INT1), a single-byte instruction historically used to trigger a breakpoint in debuggers. While it has been encountered in low-level code and debugging scenarios, it is not commonly employed in mainstream application programming and may be treated differently by modern processors and tools.

Outside of these contexts, 0xF1 is simply a byte value that may appear in data, files, network protocols, or memory dumps. Its interpretation depends on the surrounding format, such as a data field specification, encoding, or instruction set.