Binary.
Publié le 12/05/2013
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Binary. Binary, used to describe a place-value number system, or a number belonging to it, that uses 2 rather than the more common decimal system that uses 10 as its base. Each digit in a binary number represents a power of 2 and so can only hold a 0 or a 1. The number 2 functions in binary the way 10 functions in decimal numbers: each power of 2 reached--2 (21), 4 (22), 8 (23), ...--requires an additional digit in binary just as each power of 10 reached--10 (101), 100 (102), 1000 (103), ...--requires an added digit in the decimal system. The binary numbers 1 through 8 are therefore written: Decimal Binary (Base 10) (Base 2) 11 2 10 3 11 4 100 5 101 6 110 7 111 8 1000 Since you can only count to 1 before needing another digit, binary numbers are longer to write out than decimal numbers. Most digital information, such as that stored on a computer's hard drive, is in binary form. Microsoft ® Encarta ® 2009. © 1993-2008 Microsoft Corporation. All rights reserved.