Re: &&||

[Ray Andrews <rayandrews@eastlink.ca>]

On 20/02/18 12:28 PM, Bart Schaefer wrote:


That was a master class in logic.  Thank you Sensei.

>> ignored as far as truth tests on the left of any && or ||.
> No, that's entirely wrong.  Braces always return the final status of
> the enclosed list of statements.  && and || always use the final
> status of the entire chain of any && or || to their left.  The two are
> related only when the braces surround another chain of && or || but
> only in so far as that affects the final status of the braces.
Yes, I get it.  I was asking/expecting the braces to throw decision 
leftward to the preceding '&&' whereas they properly create a { combined 
truth test } to be thrown rightward to the following '||'  exactly as 
they should!

So the fact that one can often set up an &&/|| structure that looks very 
much like an if/else structure, and the fact that they will very often 
behave the same way, does not make them logically identical!!  I feel 
purified of a sin ;-)

Thanks Peter too, I know I flog these things to death.



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