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<html><head><title>XLISP set</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>set</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>xlbfun.c</nobr></td>
</tr>
</tbody></table></p>
<h2>Syntax</h2>
<dl>
<dt>(set <i>symbol expr</i>)</dt>
<dd><i>symbol</i> - expression that evaluates to a symbol name [if the
expression is quoted, no evaluation occurs]<br>
<i>expr</i> - an expression, which will be the new value<br>
returns - the new value</dd>
</dl>
<h2>Description</h2>
<p>The 'set' function evaluates 'symbol' and sets 'expr' as it's value. If
the 'symbol' value is quoted via the <a href="quote.htm">quote</a>
special form or read-macro expansion, the 'symbol' is not evaluated. 'set'
returns the value from 'expr' as it's result.</p>
<h2>Examples</h2>
<pre class="example">
(set 'a 2) <font color="#008844">; sets symbol A to value 2</font>
(set 'value a) <font color="#008844">; sets symbol VALUE to value 2</font>
(print value) <font color="#008844">; show the value - prints 2</font>
(set 'name 'myvar) <font color="#008844">; set symbol NAME to value MYVAR</font>
(set name 12345) <font color="#008844">; set symbol which is the value</font>
<font color="#008844">; of NAME (MYVAR) to 12345</font>
(print name) <font color="#008844">; prints MYVAR</font>
(print myvar) <font color="#008844">; prints 12345</font>
(set notsymbol 1) <font color="#008844">; error: unbound variable</font>
(set name notvalue) <font color="#008844">; error: unbound variable</font>
</pre>
<p>See the
<a href="../manual/xlisp-man-013.htm#set">set</a>
function in the <nobr>XLISP 2.0</nobr> manual.</p>
<p><nobr> <a href="#top">Back to Top</nobr></a></p>
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<a href="../start.htm">Nyquist / XLISP 2.0</a> -
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