0x0400

0x0400 is a hexadecimal integer literal that equals decimal 1024. In programming and digital systems, such values are commonly used to denote memory offsets, bitmasks, flags, or constant identifiers within low-level code and APIs.

In Unicode and text processing, 0x0400 is often used to refer to the code point U+0400, which lies at the start of the Cyrillic block (U+0400 to U+04FF). This block contains Cyrillic characters used by various languages, including Russian, Ukrainian, Bulgarian, and many others. The specific character assigned to U+0400 depends on the Unicode data and the font in use; U+0400 is not typically a commonly occurring letter in modern text, but it is part of the broader Cyrillic script repertoire.

Encoding details: the Unicode code point U+0400 is encoded in UTF-8 as the two-byte sequence 0xD0 0x80, in UTF-16 as 0x0400, and in UTF-32 as 0x00000400. These representations reflect how the same code point is stored in different Unicode Transformation Formats and architectures.

In practical computing, 0x0400 can function as a bit flag with the 11th bit set (2^10 = 1024). As a flag value, its meaning is context-dependent and determined by the specific API, library, or data structure in use. It may appear in permission sets, feature toggles, or protocol fields where binary masks allocate distinct powers of two for individual options.

See also: 0x0401, 0x04FF, Unicode code points, UTF-8, UTF-16, UTF-32.