File r37/lisp/csl/html/r37_0212.html artifact 5f2d2e4986 part of check-in dc9552dc80

<A NAME=ORDER>

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



<B>ORDER</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>declaration</B><P>
<P>
 
 <P>
<P>
The <em>order</em> declaration changes the order of precedence of kernels for 
display purposes only. 
 <P> <H3> 
syntax: </H3>
<P>
<P>
<em>order</em>&lt;identifier&gt;{,&lt;identifier&gt;}* 
<P>
<P>
<P>
&lt;kernel&gt; must be a valid 
<A HREF=r37_0002.html>kernel</A> or 
<A HREF=r37_0211.html>operator</A> name 
complete with argument or a 
<A HREF=r37_0053.html>list</A> of such objects. 
<P>
<P>
 <P> <H3> 
examples: </H3>
<P><PRE><TT>
x + y + z + cos(a); 

  COS(A) + X + Y + Z 


order z,y,x,cos(a); 

x + y + z + cos(a); 

  Z + Y + X + COS(A) 


(x + y)**2; 

   2            2
  Y  + 2*Y*X + X  


order nil; 

(z + cos(z))**2; 

        2                 2
  COS(Z)  + 2*COS(Z)*Z + Z

</TT></PRE><P><em>order</em>affects the printing order of the identifiers only; 
internal 
order is unchanged. Change internal order of evaluation with the 
declaration 
<A HREF=r37_0198.html>korder</A>. You can use <em>order</em> to feature variable
s 
or functions you are particularly interested in. 
<P>
<P>
Declarations made with <em>order</em> are cumulative: kernels in new order 
declarations are ordered behind those in previous declarations, and 
previous declarations retain their relative order. Of course, specific 
kernels named in new declarations are removed from previous ones and given 
the new priority. Return to the standard canonical printing order with the 
statement <em>order nil</em>. 
<P>
<P>
The print order specified by <em>order</em> commands is not in effect if the 
switch 
<A HREF=r37_0319.html>pri</A> is off. 
<P>
<P>
<P>