Binary
A base-2 number system using only 0 and 1, the foundation of all digital computing.
Each binary position represents a power of 2: 1, 2, 4, 8, 16, 32, 64, 128. The binary number 10110 = 16+4+2 = 22 in decimal. Computers use binary because electronic circuits have two reliable states (on/off). All digital data — text, images, video, software — is ultimately stored as binary patterns.
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