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<A NAME=PI>

<TITLE>PI</TITLE></A>
<b><a href=r37_idx.html>INDEX</a></b><p><p>



<B>PI</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>constant</B><P>
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The identifier <em>pi</em> is reserved for use as the circular constant. 
Its value is given by 3.14159265358..., which REDUCE gives to the current 
decimal precision when REDUCE is in a floating-point mode. 
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<P>
<em>pi</em>may be used as a looping variable in a 
<A HREF=r37_0047.html>for</A> statement, 
or as a local variable in a 
<A HREF=r37_0055.html>procedure</A>. Its value in such cases 
will be taken from the local environment. 
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<P>
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