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<A NAME=plussign>

<TITLE>plussign</TITLE></A>
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<B>+</B> _ _ _ <B>PLUSSIGN</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>operator</B><P>
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The <em>+</em> operator is a prefix or infix n-ary addition operator. 
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syntax: </H3>
&lt;expression&gt; { <em>+</em>&lt;expression&gt;}+ 
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or <em>+</em>(&lt;expression&gt; {,&lt;expression&gt;}+) 
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&lt;expression&gt; may be any valid REDUCE expression. 
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examples: </H3>
<P><PRE><TT>
x**4 + 4*x**2 + 17*x + 1; 

   4      2
  X  + 4*X  + 17*X + 1 


14 + 15 + x; 

  X + 29 


+(1,2,3,4,5); 

  15

</TT></PRE><P><em>+</em>is also valid as an addition operator for 
<A HREF=r37_0345.html>matrix</A> variables 
that are of the same dimensions and for 
<A HREF=r37_0045.html>equation</A>s. 
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