![]() Every file stored on a disk is stored as a set of bytes. Since a byte has 8 binary digits, it can represent any value from 0 up to 255 inclusive. When 8 bits are grouped together, the result is called a ' byte'. For example, the number 10110 = 1*2 4 + 0*2 3 + 1*2 2 + 1*2 1 + 0 = 22.Ī digit of a binary number is also called a ' bit'. ![]() Binary - Numbers are represented as base 2.Only the digits '0' through '7' are used ('8' or '9' is not allowed). Octal - Numbers are represented as base 8.This system is commonly referred to as Hex. All the decimal digits are used, plus the letters 'A', 'B', 'C', 'D', 'E', and 'F' are used to represent the numbers 10 through 15. Hexadecimal - Numbers are represented as base 16. ![]() ![]() The digits may be any number from '0' to '9'.
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