010001011001
010001011001 is a 12-bit binary sequence, i.e., a binary numeral. In unsigned form it represents the decimal value 1113; in hexadecimal it corresponds to 0x459. The bit pattern can be read as 0100 0101 1001, grouping into nibble blocks for readability (the nibble values are 4, 5, and 9). Since the most significant bit is 0, it denotes a non-negative value in two's complement as well, so as a 12-bit signed value it also represents 1113.
Uses and interpretation of a 12-bit pattern like this are context-dependent. Such sequences appear in digital
In programming and documentation, a binary literal may be written with a prefix (for example, 0b010001011001
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