docsrc/xlisp/xlisp-doc/reference/number-not-greaterp.htm


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<html><head><title>XLISP &lt;=</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>&lt;=</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>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>xlmath.c</nobr></td>
</tr>
</tbody></table></p>

<h2>Syntax</h2>

<p><div class="box">

<dl>
<dt><nobr>(&lt;= <i>expr1 expr2</i> ...)</nobr></dt>
<dd><i>exprN</i> - a numeric expression<br>
returns - <a href="t.htm">&nbsp;T&nbsp;</a> if the results of
comparing the expressions are all true,
<a href="nil.htm">NIL</a> otherwise</dd>
</dl>

</div></p>

<h2>Description</h2>

<p>The <nobr>'&lt;=' [less-than-or-equal]</nobr> function takes an arbitrary
number of numeric arguments. <nobr>It checks</nobr> to see if all the
numbers are monotonically <nobr>non-decreasing</nobr>.
<a href="t.htm">&nbsp;T&nbsp;</a> is returned if the arguments
are numerically, and monotonically <nobr>non-decreasing</nobr>,
<a href="nil.htm">NIL</a> is returned otherwise. <nobr>For two</nobr>
arguments, this has the effect of testing if 'expr1' is less than or equal
<nobr>to 'expr2'</nobr>.</p>

<h2>Examples</h2>

<pre class="example">
(&lt;= 1 1)            =&gt; T
(&lt;= 1 2)            =&gt; T
(&lt;= 2.0 1.99)       =&gt; NIL
(&lt;= 1 2 3 3)        =&gt; T
(&lt;= 1 2 3 3 2)      =&gt; NIL
(&lt;= "aa" "aa")      =&gt; <font color="#AA0000">error: bad argument type</font>
(setq a 12 b 99.9)  =&gt; 99.9  <font color="#008844">; set up A and B with values</font>
(&lt;= a b)            =&gt; T
(&lt;= b a)            =&gt; NIL
</pre>

<p>See <a href="setq.htm">setq</a>.</p>

<p>See also:</p>

<ul>
<li><nobr>Contents &rarr; <a href="../manual/contents.htm#arithmetic-functions">Arithmetic Functions</a></nobr></li>
</ul>

<p><nobr>&nbsp;&nbsp;<a href="#top">Back to Top</nobr></a></p>

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<a href="../manual/contents.htm">Contents</a> |
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<a href="../examples/examples.htm">Examples</a> |
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