0xC4

0xC4 is a hexadecimal byte value that represents the decimal number 196. As a single byte, it commonly appears in binary data, memory dumps, and various encodings where raw byte values are used or transmitted.

In character encodings, 0xC4 has specific mappings depending on the system. In ISO/IEC 8859-1 (Latin-1) and Windows-1252, the byte 0xC4 corresponds to the Latin capital letter A with diaeresis (Ä). In Unicode, this character is U+00C4, and its lowercase variant is U+00E4 (ä). In UTF-8, the character Ä is encoded as the two-byte sequence 0xC3 0x84, not 0xC4. The byte 0xC4 can appear as the first byte of a two-byte UTF-8 sequence for code points in the range U+0100 to U+013F, such as 0xC4 0x80 encoding U+0100.

In programming and computing practice, 0xC4 may be used as a literal representing the value 196 in source code or data files. In x86 machine code, 0xC4 can serve as the first byte of a multibyte VEX prefix used to encode certain SIMD instructions; this prefix is followed by additional bytes to complete the instruction encoding.

Overall, 0xC4 is a common hex byte with varied meanings depending on the context—numeric, textual encoding, or machine instruction encoding—rather than a single standalone symbol or constant.