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<html><head><title>XLISP =</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>=</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>xlmath.c</nobr></td>
</tr>
</tbody></table></p>
<h2>Syntax</h2>
<p><div class="box">
<dl>
<dt><nobr>(= <i>expr1 expr2</i> ...)</nobr></dt>
<dd><i>exprN</i> - a numeric expression<br>
returns - <a href="t.htm"> T </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>'=' [equality]</nobr> function takes an arbitrary number of
numeric arguments. <nobr>It checks</nobr> to see if all the numbers are
equal. <a href="t.htm"> T </a> is returned if all of the arguments
are numerically equal to each other, <a href="nil.htm">NIL</a> is returned
otherwise.</p>
<h2>Examples</h2>
<pre class="example">
(= 1 1) => T
(= 1 2) => NIL
(= 1 1.0) => T
(= 1 1.0 1 (+ 0 1)) => T
(= 1 1.0 1.00001) => NIL
(= "a" "b") => <font color="#AA0000">error: bad argument type</font>
(setq a 1 b 1.0) => 1.0 <font color="#008844">; set up A and B with values</font>
(= a b) => T
</pre>
<p>See <a href="setq.htm">setq</a>.</p>
<p>See also:</p>
<ul>
<li><nobr>Contents → <a href="../manual/contents.htm#arithmetic-functions">Arithmetic 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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