two's complement

Noun

 * 1)  The number obtained by complementing every bit of a given number and adding one. A number and its complement add to 2n, where n is the word size of the machine.
 * The two's complement of 0xAAAA is 0x5556 on a 16-bit machine, and 0xFFFF5556 on a 32-bit machine.
 * 1)  The convention by which bit patterns with high bit 0 represent positive numbers from 0 to $$2^{n-1} - 1$$ directly, while bit patterns with high bit 1 represent negative numbers from -1 to $$-2^{n - 1}$$, n being the word size of the machine, and the numeric complement of a number is its two's complement.
 * Nearly all modern computers use two's complement for integer arithmetic.

Translations

 * Finnish: kahden komplementti
 * Hungarian: kettes komplemens
 * Icelandic: tvíundafyllitala, tvíundafylling
 * Portuguese: complemento de dois