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<html><head><title>XLISP int-char</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>int-char</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>xlstr.c</nobr></td>
</tr>
</tbody></table></p>
<h2>Syntax</h2>
<dl>
<dt>(int-char <i>int</i>)</dt>
<dd><i>int</i> - an integer numeric expression<br>
returns - the character with that code</dd>
</dl>
<h2>Description</h2>
<p>The 'int-char' function returns a character which is the result of turning the
'int' expression into a character. If a 'int' cannot be made into a
character, an error is signalled:</p>
<pre class="example">
<font color="#AA0000">error: character code out of range</font>
</pre>
<p>The range that 'int' produces a valid character is 0 through 255.</p>
<h2>Examples</h2>
<pre class="example">
(int-char 48) <font color="#008844">; returns #\0</font>
(int-char 65) <font color="#008844">; returns #\A</font>
(int-char 97) <font color="#008844">; returns #\a</font>
(int-char 91) <font color="#008844">; returns #\[</font>
(int-char 10) <font color="#008844">; returns #\Newline</font>
(int-char 999) <font color="#008844">; error - character code out of range</font>
</pre>
<p><b>Common Lisp:</b> Common Lisp specifies that 'int-char' should return a
<a href="nil.htm">NIL</a> when there is no valid character for
the integer value being passed in while XLISP generates an error in these cases.
In some cases it is possible to substitue the
<a href="code-char.htm">code-char</a> function for 'int-char'.</p>
<p><b>Note:</b> Unlike the <a href="char-code.htm">char-code</a> and
<a href="char-int.htm">char-int</a> functions,
<a href="code-char.htm">code-char</a> and 'int-char' are not identical
in use. <a href="code-char.htm">code-char</a> accepts 0..127 for its
range and then produces <a href="nil.htm">NIL</a> results while
'int-char' accepts 0..255 for its range and then produces errors.</p>
<p>See the
<a href="../manual/xlisp-man-026.htm#int-char">int-char</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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