
<A NAME=ARGLENGTH>

<TITLE>ARGLENGTH</TITLE></A>
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<B>ARGLENGTH</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>operator</B><P>
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The operator <em>arglength</em> returns the number of arguments of the top-level
 
operator in its argument. 
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syntax: </H3>
<em>arglength</em>(&lt;expression&gt;) 
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&lt;expression&gt; can be any valid REDUCE algebraic expression. 
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examples: </H3>
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arglength(a + b + c + d); 

  4 


arglength(a/b/c); 

  2 


arglength(log(sin(df(r**3*x,x)))); 


  1

</TT></PRE><P>In the first example, <em>+</em> is an n-ary operator, so the numb
er of terms 
is returned. In the second example, since <em>/</em> is a binary operator, the 
argument is actually (a/b)/c, so there are two terms at the top level. In 
the last example, no matter how deeply the operators are nested, there is 
still only one argument at the top level. 
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