# Factorials : Number Data Type « Language Basics « JavaScript DHTML

Factorials

```
/*
Examples From
JavaScript: The Definitive Guide, Fourth Edition

Legal matters: these files were created by David Flanagan, and are
Copyright (c) 2001 by David Flanagan.  You may use, study, modify, and
distribute them for any purpose.  Please note that these examples are
provided "as-is" and come with no warranty of any kind.

David Flanagan
*/

<html>
<body>
<script language="JavaScript">
document.write("<h2>Table of Factorials</h2>");
for(i = 1, fact = 1; i < 10; i++, fact *= i) {
document.write(i + "! = " + fact);
document.write("<br>");
}
</script>
</body>
</html>

```

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