0x18FF

0x18FF is a hexadecimal literal commonly encountered in computing. In base-16 notation it consists of the digits 1, 8, F, and F. Its value in decimal is 6399, and in binary it is 0001 1000 1111 1111 when viewed as a 16-bit quantity. In 32-bit representations it is often written as 0x000018FF.

In practical use, 0x18FF may appear as a constant in source code, where it can represent a wide range of data depending on context. It could encode a numeric constant, serve as a bitmask, act as a memory address or register selector, or be part of a color value in certain 24- or 32-bit color schemes (for example as part of a 0xRRGGBB interpretation with leading zeros). The exact meaning is determined by how the program interprets the bits.

Unicode usage is sometimes noted with the form U+18FF. This code point lies within the Mongolian block in the Unicode standard, and the visible glyph (if any) depends on font support and rendering. As with many code points, not all environments assign or render a visible character for U+18FF.

In programming practice, the 0x prefix is widely supported to denote hexadecimal literals in languages such as C, C++, Java, JavaScript, and Python. Caution is warranted when mixing numeral bases in less common contexts, but the 0x prefix generally eliminates octal ambiguity present in older notations.

See also: hexadecimal notation, binary representation, Unicode code points, color encodings.