Doubt in two compiment

Bhuvanesh123 · Jul 20, 2014

i am thinking that 2'complient of '000'is 000.But everyone saying it is '1000'.HOW?

andre_luis · Jul 20, 2014

A2 complement of a number N means:

A2(N) = ~N +1

Applying to N=000:

Assuming a result magnitude of 3 bits, we obtain 000
Assuming a result magnitude of 4 bits, we obtain 1000

+++

Gorgon · Jul 20, 2014

It's really a '000' + a carry in the next position.

pjmelect · Jul 21, 2014

When you do a two's compliment to do a subtraction you normally ignore the carry so the number is just 000

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