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<html><head><title>XLISP car</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>car</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>
<p><div class="box">
<dl>
<dt>(<b>car</b> <i>expr</i>)</dt>
<dd><i>expr</i> - a list or list expression<br>
returns - the first element of the list</dd>
</dl>
</div></p>
<h2>Description</h2>
<p>The 'car' function returns the <a href="first.htm">first</a> element of
the expression. <nobr>If the</nobr> <a href="first.htm">first</a> expression
is itself a list, then the sublist is returned. <nobr>If the</nobr> list is
<nobr><a href="nil.htm">NIL</a> ,</nobr> <a href="nil.htm">NIL</a> is
returned.</p>
<p>The 'car' function returns the same result as the
<a href="first.htm">first</a> function.</p>
<h2>Examples</h2>
<pre class="example">
(car '(a b c)) => A
(car '((a b) c d)) => (A B)
(car NIL) => NIL
(car 'a) => <font color="#AA0000">error: bad argument type</font>
(setq bob '(1 2 3)) => (1 2 3)
(car bob) => 1
</pre>
<p>See also:</p>
<ul>
<li><nobr>Contents → <a href="../manual/contents.htm#list-functions">List Functions</a></nobr></li>
<li><nobr>Tutorials → Lisp Hints → <a href="../tutorials/lisp-hints.htm#list-accessors">List Accessors</a></nobr></li>
</ul>
<p><nobr> <a href="#top">Back to Top</nobr></a></p>
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