0xF3

0xF3 is a hexadecimal notation representing the eight-bit value F3, which equals 243 in decimal. It is commonly encountered in computing wherever data are expressed as bytes, such as memory contents, binary file formats, and network protocols.

Numeric interpretation

As an unsigned value, 0xF3 = 243. If interpreted as a signed 8-bit integer using two’s complement, it represents -13. In many programming languages, 0xF3 is written with the 0x prefix to indicate a hexadecimal constant.

Character encoding

In ISO/IEC 8859-1 (Latin-1) and Unicode, the byte 0xF3 maps to the character ó (Latin small letter o with acute), which has the Unicode code point U+00F3. In UTF-8, 0xF3 by itself is not a printable ASCII character; it is a lead byte used to start a four-byte sequence that encodes code points in the range U+10000 to U+10FFFF, depending on the following continuation bytes.

Usage and context

0xF3 is frequently seen in low-level programming, embedded systems, and binary data analysis as a byte value. It can appear in bitwise operations, masks, color channel values (where a component might be 0–255), or as part of memory dumps. In debugging or reverse engineering, sequences containing 0xF3 may indicate encoded characters or specific protocol fields, depending on the encoding and context.

See also

Hexadecimal notation, two’s complement, ISO/IEC 8859-1, Unicode, UTF-8.