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Line 24: * +7 is written 0 0111 * −7 is written 1 1000 and their sum is written as "1  1111" (one of two representations of zero in this system; zero can also be written as "0 0000"). On modern machines, in classic binary notation, −7 would be written 1 1001, and the sum of −7 and 7 would give "0 0000"; this "two's complement" system thus needs only a single representation for the number zero.

Bibi-binary: Difference between revisions