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From: Dave Angel <davea@davea.name>
Subject: Re: Can global variable be passed into Python function?
Date: Sat, 22 Feb 2014 10:02:10 -0500 (EST)
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 Mark Lawrence <breamoreboy@yahoo.co.uk> Wrote in message:
> On 22/02/2014 02:47, Dennis Lee Bieber wrote:
>> 	BASIC, C, FORTRAN, COBOL, Assembly... A "variable" is synonym for an
>> address [a box that holds things].
>>
> 
> In C.
> 
> int xyz = 1;
> 
> xyz is placed in a register.  What is xyz called now as it's not in memory?

Don't know why you'd assume it's a register.  It could just as
 well be nowhere.  If a later reference in the same function adds
 it to something else, there might not need to be any hardware
 anywhere representing the value 1.

Once you turn on a C optimizer, the real existence of local values
 is not assured.


-- 
DaveA