Positional number systems use a base (radix). Base 10 (decimal): 0–9; Base 2 (binary): 0–1; Base 16 (hexadecimal): 0–9 and A–F. Computers operate in binary; hex is shorthand for binary in programming.
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Did You Know?
Computers use binary because electronics only need two states: on/off — far simpler to engineer than the 10 states needed for decimal.
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