Find Factorial of Number using JavaScript

Factorial calculator script allows you to find factorial of given number using JavaScript.

Features

Factorial script is used for all factorial calculations.
Find factorial of any number, using this calculator script.
We can handle this script easily and it works in all major browsers.

Preview

Enter Value

Downloads

Click select code button to copy factorial number script. Javascript Code

<html>
<head>
<title>Factorial Number Calculator Script</title>
<script type="text/javascript" src="https://www.hscripts.com/jquery.js"></script>
<style type='text/css'>
.tb7
{
background: white;
border: 1px solid #DDD;
border-radius: 5px;
box-shadow: 0 0 5px #DDD inset;
color: #666;
float: left;
padding: 5px 10px;
width: 250px;
height: 40px;
outline: none;
}
.testbutton
{
text-align: center;
font-size: 15px;
cursor: pointer;
width: 100px;
height: 40px;
color: #4e4e4e;
}
</style>
<script type='text/javascript'>
var factorial = 1;
function getfact()
{
var sds = document.getElementById("dum");
if(sds == null)
{
alert("You are using a free package.\n You are not allowed to remove the tag.\n");
}
var sdss = document.getElementById("dumdiv");
if(sdss == null){
alert("You are using a free package.\n You are not allowed to remove the tag.\n");
}
if(sdss != null)
{
$("#dispans").html("");
var value = $("#factval").val();
var num = isNaN(value);
if(value=="")
{
$("#factval1").html("Enter the value");
setTimeout(function() {
$("#factval1").html("");
}, 3000);
}
else
{
if(value>170)
{
$("#factval1").html("Entered value exceeds limit");
setTimeout(function() {
$("#factval1").html("");
}, 3000);
}
else
{
$("#factval1").html("");
for (var x=value; x>=1; x--)
{
factorial = factorial * x;
}
$("#dispans").html("The Factorial of '"+value+"' is : <span style='color:#900B09;font-size: 18px;'>"+factorial+"</span>");
factorial=1;
}
}
}
}
function isNumberKey(id)
{
var no=eval('"'+id+'"');
var no1=eval('"'+id+'1"');
var number= document.getElementById(no).value;
var number1= document.getElementById(no1);
if(!number.match(/^[0-9]+$/) && number !="")
{
document.getElementById(id).value="";
document.getElementById(id).focus();
number1.innerHTML="<font color='red'>Enter numbers only</font>";
setTimeout(function() {
$("#factval1").html("");}, 3000);
}
}function resetval(){
$("#factval").val("");
$("#factval1").html("");
$("#dispans").html("");}
</script>
</head>
<body><div align='center'>
<div align='center' style='color: #4e4e4e; font-size: 20px; padding-top: 50px;'>Factorial Number Calculator Script</div><br>
<span id='factval1' style='color:red;font-size:15px;font-family:arial,verdana,san-serif;'></span><br><br><table align='center'>
<tr><td style='font-family: arial,verdana,san-serif;font-size: 15px;color:#666;'>Enter Value : </td>
<td><input type='text' id='factval' class='tb7' maxlength='3' onkeyup="isNumberKey(this.id)" /> </td>
<td> <input type='button' onclick='getfact()' value='Get Factorial' class='testbutton'> <input type='button' onclick='resetval()' value='Reset' class='testbutton'> </td>
</tr>
</table><br><div id='dispans' style='color: #2f4f4f;margin-top: 5px;'></div><br>
<div align=center style=" font-size: 10px;color: green;" id="dumdiv">
<a href="https://www.hscripts.com" id="dum" style="padding-right:0px; text-decoration:none;color: green;">©h</a></div></div>
</body>
</html>

Release Date - 28-11-2013
Get free version without ©copyright link for just $10/-
For customization of this script or any script development, mail to support@hscripts.com