0x129

0x129 is a hexadecimal notation for an unsigned integer. In the base‑16 numbering system it is written as 0x129, where the leading “0x” indicates that the subsequent digits are in hex. The value equals 297 in decimal notation, or 100101001 in binary. When interpreted as an 8‑bit quantity it would wrap around to 145, since decimal 297 exceeds the 0–255 range. As an address in computer memory it might designate the offset 0x0129 within a larger address space, often found in examples dealing with low‑level hardware or embedded firmware. In many programming languages, such as C, C++, Java, and Python, 0x129 can be written literally to assign the integer 297 to a variable or to specify a byte value. It does not correspond to a printable character in the standard ASCII table, so it is rarely used for text data. In assembly language for certain processors, 0x129 could appear as part of an opcode stream or a relocation entry, though its meaning depends on the instruction set architecture. In cryptographic contexts, concrete hex strings like 0x129 might form a fragment of a key or hash, but by itself they carry no special significance beyond being a numeric literal. The notation is widely supported in documentation for hardware registers, firmware debugging, and software source code that requires explicit base‑16 literals.