Search Result for "octal":
Wordnet 3.0

1. of or pertaining to a number system having 8 as its base;
- Example: "an octal digit"

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WordNet (r) 3.0 (2006):octal
adj 1: of or pertaining to a number system having 8 as its base;
"an octal digit"

The Free On-line Dictionary of Computing (30 December 2018):octal

Number base eight.  The octal number
representation uses the digits 0-7 only, with the right-most
digit counting ones, the next counting multiples of 8, then
8^2 = 64, etc.  For example, octal 177 is digital 127:

digit    weight        value
1     8^2 = 64   1* 64 = 64
7     8^1 =  8   7*  8 = 56
7     8^0 =  1   7*  1 =  7
---
127

Octal representation used to be widespread back when many
computers used six-bit bytes, as six-bits can be
conveniently written as a two-digit octal number.  Since
nowadays a byte is almost always eight bits long, the octal
system lost most of its appeal to the hexadecimal system.
Octal is still found in the C programming language and its
descendents where it is commonly to represent characters, as
in 'A' = '\101', 101 being octal for 65, the ASCII
character code for 'A'.

For a brief discussion on the word `octal' see hexadecimal.

(2017-12-18)
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