Posted by Wolfgang Helbig-2 on Jul 04, 2006; 7:11pm
URL: https://forum.world.st/Shouldn-t-7r6-5-be-the-same-as-7r65-0-1-tp51969p51971.html

Klaus, you asked:
>Would some good soul please explain what
>
> Number readFrom: '7r6.5'

And here is the good soul's answer:

7r6.5 = 6*7^0 + 5 * 7^(-1) = 6 + 5/7 = 6.714285714285... with the last
6 digits repeating at infinitum.

Whereas 7r65 * 0.1 should evaluate to
7r65 * 0.1 = (6*7^1 + 5*7^0) * 10^-1 = (6*7 + 5) / 10 = 4.7

(Notation: "^" is the exponentation operator, like 3^2 = 3 * 3 = 9).

Greetings,
Wolfgang

--
"Dijkstra is right, but you don't say such things!"
(A less courageous programmer)