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From: Joe Riel <joer@san.rr.com>
Newsgroups: comp.soft-sys.math.maple
Subject: Re: Question about concatenation =?utf-8?B?4oCcYXx8YuKAnQ==?= in Maple?
Date: Wed, 08 Feb 2012 12:52:26 -0800
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Rex <aoirex@gmail.com> writes:

> Great thanks Adri. Sorry for my typo for "L:=".
>
> I have one further question. Here's the test code:
>
>         L := [2, 1]
>         test := proc (i) local a1; a1 := 1; add(a || b*L[i], b = 1 ..
> 2) end proc
>         test(1);
> will result
>                           2 a1 + 2 a2
> without evaluating `a1` which is a local variable defined in function
> test.
> I expect to get `2*1+2*a2`.

The catenation operator generates global variables, not locals.
Using indexing if you want to refer to a local by an index.

-- 
Joe Riel