[Tutor] Magic numbers

[Dennis Lee Bieber]

On Thu, 5 Aug 2021 17:48:02 +1000, Phil <phillor9 at gmail.com> declaimed the
following:

>128 is bit 7, in this example, of an 8 bit number.

	But what is /significant/ about bit-7 (and are you counting bits
starting from 0, or from 1. It matters for documentation since when
counting from 0, bit-7 is the /eighth/ bit in the byte).


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