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<html><head><title>XLISP reverse</title>
<link rel="stylesheet" type="text/css" href="reference.css">
</head>
<body>
<a href="../start.htm">Nyquist / XLISP 2.0</a> -
<a href="../manual/contents.htm">Contents</a> |
<a href="../tutorials/tutorials.htm">Tutorials</a> |
<a href="../examples/examples.htm">Examples</a> |
<a href="reference-index.htm">Reference</a>
<hr>
<h1>reverse</h1>
<hr>
<p><table cellpadding="0" cellspacing="0" style="margin-left:10px"><tbody>
<tr valign="top">
<td><nobr>Type:</nobr></td>
<td><nobr> - </nobr></td>
<td width="100%"><nobr>function (subr)</nobr></td>
</tr>
<tr valign="top">
<td><nobr>Source:</nobr></td>
<td><nobr> - </nobr></td>
<td width="100%"><nobr>xllist.c</nobr></td>
</tr>
</tbody></table></p>
<h2>Syntax</h2>
<dl>
<dt>(reverse list-expr)</dt>
<dd><i>list-expr</i> - a list or list expression<br>
returns - a new list in the reverse order</dd>
</dl>
<h2>Description</h2>
<p>The 'reverse' function reverses the 'list-expr'. The reversed list is the
returned value. The reversal process only occurs on the 'top-level' of the
'list-expr'. If there are nested sub-lists, these are left intact.</p>
<h2>Examples</h2>
<pre class="example">
(reverse NIL) <font color="#008844">; returns NIL</font>
(reverse 'a) <font color="#008844">; error: bad argument type</font>
(reverse '(a)) <font color="#008844">; returns (A)</font>
(reverse '(a b c)) <font color="#008844">; returns (C B A)</font>
(reverse '((a b) (c d) (e f))) <font color="#008844">; returns ((E F) (C D) (A B))</font>
(reverse (list (+ 1 2) (+ 3 4))) <font color="#008844">; returns (7 3)</font>
</pre>
<p>See the
<a href="../manual/xlisp-man-016.htm#reverse">reverse</a>
function in the <nobr>XLISP 2.0</nobr> manual.</p>
<p><nobr> <a href="#top">Back to Top</nobr></a></p>
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