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Differences where variable dimensioned?

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KenHorse

Bascom Member

Joined: 16 Jul 2004
Posts: 523

Posted: Sat Aug 07, 2021 6:25 pm Post subject: Differences where variable dimensioned?

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Is there any practical difference between declaring a variable this way:

Code:

Sub Whatever

Dim Array(10) as Byte

    <code of sub>

End Sub

versus this:

Code:

Dim Array(10) as Byte

Sub Whatever

   <code of sub>

End Sub

[/code]

(BASCOM-AVR version : 2.0.8.3 , Latest : 2.0.8.4 )

Evert :-)

Bascom Expert

Joined: 18 Feb 2005
Posts: 2156

Posted: Sat Aug 07, 2021 7:31 pm Post subject:

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Form the help file:

Quote:

SCOPE
The scope for DIM is global. So no matter where you use the DIM statements, the variable will end up as a global visible variable that is visible in all modules, procedures and functions.

When you need a LOCAL variable that is local to the procedure or function, you can use LOCAL.
Since LOCAL variables are stored on the frame, it takes more code to dynamic generate and clean up these variables. This because all functions and subs are fully re-entrant. (re-entrant means they can call themselves recursively)

So, no there's no difference.
Except that in the second case it's clear that the variable belongs(needed by) to the sub.
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KenHorse

Bascom Member

Joined: 16 Jul 2004
Posts: 523

Posted: Sat Aug 07, 2021 8:09 pm Post subject:

And where those variables are actually stores within RAM, yes?

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