The difference between Hexadecimal and Octal
When used as nouns, hexadecimal means a number system with base 16, using the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e and f, useful in computing as a hexadecimal digit can represent four bits, half a standard byte, whereas octal means the number system that uses the eight digits 0, 1, 2, 3, 4, 5, 6, 7.
When used as adjectives, hexadecimal means of a number, expressed in hexadecimal, whereas octal means concerning numbers expressed in octal or mathematical calculations performed using octal.
check bellow for the other definitions of Hexadecimal and Octal
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Hexadecimal as a noun (arithmetic, computing, uncountable):
A number system with base 16, using the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E and F, useful in computing as a hexadecimal digit can represent four bits, half a standard byte.
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Hexadecimal as a noun (countable, computing):
A number expressed in the hexadecimal system.
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Hexadecimal as an adjective:
Of a number, expressed in hexadecimal.
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Octal as a noun (arithmetic, computing, uncountable):
The number system that uses the eight digits 0, 1, 2, 3, 4, 5, 6, 7.
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Octal as a noun (arithmetic, computing, countable):
A digit or value in the octal number system.
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Octal as an adjective (arithmetic, computing):
Concerning numbers expressed in octal or mathematical calculations performed using octal.