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From: BobD <daycandle@gmail.com>
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Subject: Re: What does "lacks a prefix" mean?
Date: Wed, 8 Jul 2015 11:45:48 -0700 (PDT)
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On Wednesday, July 8, 2015 at 2:21:07 PM UTC-4, Pascal J. Bourguignon wrote:
> BobD <...> writes:
> 
> > How do I create a variable with local execution scope, i.e. to be
> > known within a function, not to other elisp functions, and regardless
> > of which buffer is local?
> 
> Using let, of course.
> 
> (defun f (x)
>   (let ((y (+ 1 x)))
>     (* 2 y)))
> 
> ...

But of course.
I'm fooling with old elisp that uses "setq" willy-nilly, defying the notational structuring with which latter day programmers have been (properly) indoctrinated.  If I must, I can wedge some let's into the code.