
<A NAME=NIL>

<TITLE>NIL</TITLE></A>
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<B>NIL</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>constant</B><P>
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<em>nil</em>represents the truth value false in symbolic mode, and is 
a synonym for 0 in algebraic mode. It cannot be used for any other 
purpose, even inside procedures or 
<A HREF=r37_0047.html>for</A> loops. 
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