two's complement

Noun

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Noun

**two's complement**

- (
*computing*) The number obtained by complementing every bit of a given number and adding one. A number and its complement add to 2^{n}, 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.

- (
*computing*) 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.

- Portuguese: complemento de dois

This text is extracted from the Wiktionary and it is available under the CC BY-SA 3.0 license | Terms and conditions | Privacy policy 0.005