Negatives in Binary - Chief Delphi

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Negatives in Binary

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#13

10-02-2007, 21:28

TimCraig

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Re: Negatives in Binary

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Originally Posted by something

A signed 4-bit value would only be able to represent values from 4 to -4. Check out two's complement on wikipedia for more info on binary representations of negative numbers.

Actually, 4 bits provides 16 possible combinations of 0 and 1 so it can represent 0 to 15 as an unsigned integer or -8 to +7 as a signed integer.
(unsigned integer in this case being a mathematical term rather than the C type).

Yes, typically computers represent signed integers as two's complement so negative numbers have the high bit set.

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