1 files changed, 80 insertions, 0 deletions
diff --git a/docsrc/xlisp/xlisp-doc/reference/not.htm b/docsrc/xlisp/xlisp-doc/reference/not.htm
new file mode 100644
index 0000000..a6ba8d0
--- /dev/null
+++ b/docsrc/xlisp/xlisp-doc/reference/not.htm
@@ -0,0 +1,80 @@
+<html><head><title>XLISP not</title>
+
+<link rel="stylesheet" type="text/css" href="reference.css">
+
+</head>
+
+<body>
+
+<a href="../start.htm">Nyquist / XLISP 2.0</a>&nbsp; -&nbsp;
+<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>not</h1>
+
+<hr>
+
+<p><table cellpadding="0" cellspacing="0" style="margin-left:10px"><tbody>
+<tr valign="top">
+  <td><nobr>Type:</nobr></td>
+  <td><nobr>&nbsp;&nbsp;-&nbsp;&nbsp;</nobr></td>
+  <td width="100%"><nobr>predicate function (subr)</nobr></td>
+</tr>
+<tr valign="top">
+  <td><nobr>Source:</nobr></td>
+  <td><nobr>&nbsp;&nbsp;-&nbsp;&nbsp;</nobr></td>
+  <td width="100%"><nobr>xlbfun.c</nobr></td>
+</tr>
+</tbody></table></p>
+
+<h2>Syntax</h2>
+
+<dl>
+<dt>(not <i>expr</i>)</dt>
+<dd><i>expr</i> - the expression to check<br>
+return - <a href="t.htm">&nbsp;T&nbsp;</a> if the value is
+<nobr><a href="nil.htm">NIL</a> ,</nobr>
+<a href="nil.htm">NIL</a> otherwise</dd>
+</dl>
+
+<h2>Description</h2>
+
+<p>The 'not' predicate function checks to see if the 'expr' is false.
+<a href="t.htm">&nbsp;T&nbsp;</a> is returned if the
+expression is <nobr><a href="nil.htm">NIL</a> ,</nobr>
+<a href="nil.htm">NIL</a> is returned otherwise.</p>
+
+<h2>Examples</h2>
+
+<pre class="example">
+(not '())      <font color="#008844">; returns T - empty list</font>
+(not ())       <font color="#008844">; returns T - still empty</font>
+(setq a NIL)   <font color="#008844">; set up a variable</font>
+(not a)        <font color="#008844">; returns T - value = empty list</font>
+
+(not "a")      <font color="#008844">; returns NIL - not a list</font>
+(not 'a)       <font color="#008844">; returns NIL - not a list</font>
+</pre>
+
+<p><b>Note:</b> The 'not' predicate is the same function as the
+<a href="null.htm">null</a> predicate.</p>
+
+<p>See the
+<a href="../manual/xlisp-man-018.htm#not">not</a>
+predicate function in the <nobr>XLISP 2.0</nobr> manual.</p>
+
+<p><nobr>&nbsp;&nbsp;<a href="#top">Back to Top</nobr></a></p>
+
+<hr>
+
+<a href="../start.htm">Nyquist / XLISP 2.0</a>&nbsp; -&nbsp;
+<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>
+
+</body></html>
+\ No newline at end of file