how to handle empty expressions?

• Subject: how to handle empty expressions?
• From: Oliver Kullmann
• Date: Sat, 26 May 2012 12:48:46 +0100

Hello,

I have a loop like

for x in list unless (var : boolean expression) do "nothing";

Is there a Maxima idiom for "nothing"? It seems to use "0" is a safe way.
Is there a better way (like "nil")?

Thanks

Oliver

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