0x19D

0x19D is a hexadecimal literal. In decimal terms, it represents the value 413. In other common bases, it equals binary 110011101 and octal 635. The presence of the 0x prefix denotes hexadecimal notation, a convention widely used in programming and computing to express values that align with binary and memory architectures.

In computing, 0x19D can appear as a numeric literal, a memory address, a bitmask, an opcode, or an identifier, depending on the surrounding context. Hexadecimal notation is favored in low-level software, firmware, and hardware documentation because each hex digit maps neatly to four binary bits, providing a compact representation of binary data.

Origin and usage: the 0x prefix originated in the C programming language and has since been adopted by many languages, including C++, Java, JavaScript, Python, and various assembly languages. It serves as a clear indicator that the following digits are in base 16, avoiding confusion with decimal or octal representations.

Numeric properties: 413 factors as 7 × 59, making it a composite number. The value 0x19D can be padded with leading zeros (for example, 0x019D) without changing its value, a common practice when aligning hex values to fixed widths in data structures or registers.

See also: hexadecimal numeral system, 0x prefix, memory addressing, bitwise operations, and numeric literals in programming.