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<html><head><title>XLISP char-lessp</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>char-lessp</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>predicate function (subr)</nobr></td>
</tr>
<tr valign="top">
<td><nobr>Source:</nobr></td>
<td><nobr> - </nobr></td>
<td width="100%"><nobr>xlstr.c</nobr></td>
</tr>
</tbody></table></p>
<h2>Syntax</h2>
<p><div class="box">
<dl>
<dt>(<b>char-lessp</b> <i>char1 charN</i> ... )</dt>
<dd><i>char1</i> - a character expression<br>
<i>charN</i> - character expression[s] to compare<br>
returns - <a href="t.htm"> T </a>
if the characters are of monotonically increasing
<a href="../misc/ascii-table.htm">ASCII</a> value,
<a href="nil.htm">NIL</a> otherwise<br>
<b>Note:</b> case is not significant with this function</dd>
</dl>
</div></p>
<h2>Description</h2>
<p>The '<nobr>char-lessp</nobr>' function tests if all the character
arguments are monotonically increasing.
<nobr><a href="t.htm"> T </a> is</nobr> returned if the arguments
are of increasing <a href="../misc/ascii-table.htm">ASCII</a> value,
<a href="nil.htm">NIL</a> otherwise. <nobr>In the</nobr> case of two
arguments, this has the effect of testing if 'char1' is less than 'char2'.
This test is case insensitive, the <nobr>character '#\a'</nobr> is
considered to be the same <a href="../misc/ascii-table.htm">ASCII</a> value
as the <nobr>character '#\A'.</nobr></p>
<h2>Examples</h2>
<pre class="example">
(char-lessp #\a #\b) => T
(char-lessp #\b #\a) => NIL
(char-lessp #\a #\b #\c) => T
(char-lessp #\a #\a) => NIL
(char-lessp #\a #\b #\b) => NIL
(char-lessp #\A #\a) => NIL
(char-lessp #\a #\A) => NIL
</pre>
<p>See also:</p>
<ul>
<li><nobr>Contents → <a href="../manual/contents.htm#character-functions">Character Functions</a></nobr></li>
</ul>
<p><nobr> <a href="#top">Back to Top</nobr></a></p>
<hr>
<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>
</body></html>
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