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<B>=></B> _ _ _ <B>REPLACE</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>operator</B><P>
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The <em>=&gt;</em> operator is a binary operator used in 
<A HREF=r37_0060.html>rule</A> lists to 
denote replacements. 
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examples: </H3>
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operator f; 

let f(x) =&gt; x^2; 

f(x); 

   2
  x

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