tamamlayıcı mantıksal

listen to the pronunciation of tamamlayıcı mantıksal
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logical complement
The number, obtained by complementing every bit of a given number, which produces all ones when exclusive ored with the given number

The logical complement of 0xAAAA is 0x5555 on a 16-bit machine, and 0xFFFF5555 on a 32-bit machine.