How to make a factorial calculator program using Javascript and html.

Learn to make a factorial calculator program using JavaScript and Html.

(2 minutes coding)

Steps to make your own factorial calculator using JavaScripts and Html.

1. Open NOTEPAD or NOTEPAD++ in your computer .

2.Copy the code given below .

<!doctype html>
<html>
<head>
<script>
function fac(){

var i, n, fact;
fact=1;
n=parseInt(document.getElementById("num").value);
for(i=1; i<=n; i++)
{
fact= fact*i;
}
document.getElementById("ans").value= fact;
}
</script>
</head>
<body bgcolor= "black" text= "gold" alignment ="center">
<h1>FACTORIAL CALCULATOR</h1><br>
Enter Num: <input id="num" value=0 maxlength=3;>
<br>
&nbsp &nbsp&nbsp &nbsp&nbsp &nbsp&nbsp &nbsp&nbsp &nbsp&nbsp &nbsp&nbsp &nbsp&nbsp &nbsp&nbsp &nbsp&nbsp &nbsp
<button onclick="fac()">Enter</button>
<br>

&nbsp &nbsp&nbsp &nbspResult=<input id="ans" readonly><br>
</body>
</html>

3. Now paste it in your Notepad file.