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<B>^</B> _ _ _ <B>CARET</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>operator</B><P>
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The <em>^</em> operator is a prefix or infix binary exponentiation operator. 
It is equivalent to 
<A HREF=r37_0031.html>power</A> or **. 
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 <P> <H3> 
syntax: </H3>
&lt;expression&gt; <em>^</em>&lt;expression&gt; 
 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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 <P> <H3> 
examples: </H3>
<P><PRE><TT>
x^15; 

   15
  X   


x^y^z; 

   Y*Z
  X    


x^(y^z); 

    Z
   Y
  X   


^(y,4); 

   4
  Y  


on rounded; 

2^pi; 

  8.82497782708

</TT></PRE><P>The exponentiation operator is left associative, so that <em>a^b^c
</em> is 
equivalent to <em>(a^b)^c</em>, as shown in the second example. Note 
that this is &lt;not&gt; <em>a^(b^c)</em>, which would be right associative. 
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When 
<A HREF=r37_0308.html>nat</A> is on (the default), REDUCE output produces raised
 
exponents, as shown. 
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A square 
<A HREF=r37_0345.html>matrix</A> may also be raised to positive 
and negative powers with 
the exponentiation operator (negative powers require the matrix to be 
invertible). Scalar expressions and 
<A HREF=r37_0045.html>equation</A>s 
may be raised to fractional and floating-point powers. 
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