0x0066

0x0066 is a hexadecimal literal used in computing to denote the numeric value 102 in decimal. The prefix 0x signals hexadecimal notation, and the four hexadecimal digits reflect a representation that is often used for 16-bit or wider values, sometimes with leading zeros for alignment.

In Unicode and ASCII contexts, 0x0066 corresponds to the Latin small letter f. In Unicode this is code point U+0066 (LATIN SMALL LETTER F), which is also the character represented by the ASCII byte 0x66. Because U+0066 falls within the ASCII range, its UTF-8 encoding is a single byte 0x66, and its UTF-16 encoding is the 16-bit value 0x0066. In UTF-32, the code point is represented as 0x00000066.

Memory and endianness considerations can affect how 0x0066 appears in sequences. In a 16-bit little-endian context, the value 0x0066 would be stored as the byte sequence 0x66 0x00, whereas in big-endian it would be 0x00 0x66. This distinction matters when interpreting binary data, memory dumps, or network protocols that specify endianness.

Practical usage of 0x0066 includes representing character data in low-level programming, debugging outputs, and binary formats where fixed-width hex literals are preferred. It also serves as an example of how a single character can be represented across different encodings, illustrating the relationship between Unicode code points, ASCII values, and various UTF encodings.