File r37/lisp/csl/html/r37_0166.html artifact 09d4a3655c part of check-in b7c3de82ef

<A NAME=NUM>

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



<B>NUM</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>operator</B><P>
<P>
 
 <P>
<P>
The <em>num</em> operator returns the numerator of its argument. 
 <P> <H3> 
syntax: </H3>
<P>
<P>
<em>num</em>(&lt;expression&gt;) or <em>num</em> &lt;simple\_expression&gt; 
<P>
<P>
<P>
&lt;expression&gt; can be any valid REDUCE scalar expression. 
<P>
<P>
 <P> <H3> 
examples: </H3>
<P><PRE><TT>
num(100/6); 

  50 


num(a/5 + b/6); 

  6*A + 5*B 


num(sin(x)); 

  SIN(X)

</TT></PRE><P><em>num</em>returns the numerator of the expression after it has b
een simplified 
by REDUCE. As seen in the examples, this includes putting sums of rational 
expressions over a common denominator, and reducing common factors where 
possible. If the expression is not a rational expression, it is returned 
unchanged. 
<P>
<P>
<P>