Calling a Generalizable Function : Function : Language Basics JAVASCRIPT DHTML TUTORIALS

JAVASCRIPT DHTML TUTORIALS » Language Basics » Function »

Calling a Generalizable Function



<HTML>
<HEAD>
<TITLE>Variable Scope Trials</TITLE>
<SCRIPT LANGUAGE="JavaScript">
function factorial(n) {
    if (n > 0) {
        return n * (factorial(n - 1));
    } else {
       return 1;
    }
}
</SCRIPT>
</HEAD>
<BODY>
<FORM>
Enter an input value: <INPUT TYPE="text" NAME="input" VALUE=0>
<P><INPUT TYPE="button" VALUE="Calc Factorial" 
    onClick="this.form.output.value = factorial(this.form.input.value)">
<P>Results: <INPUT TYPE="text" NAME="output">
</FORM>
</BODY>
</HTML>