For digital equipment, the number system is binary (base 2). But expressing something in binary leads to too many bits to use, so it’s not practical.
Hexadecimal is a convenient way to express binary numbers in modern computers, in which a byte is defined as containing eight binary digits.
Each hexadecimal digit represents four binary digits, also called nibbles, which are half a byte. Two hexadecimal digits can represent eight binary digits or bytes.
Hexadecimal allows us to use 4 times fewer bits, which is very convenient.
Hexadecimal numbers are widely used by computer system developers and programmers because they provide a human-friendly representation of binary encoded values.
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