Javascript NPR Calculation

Javascript NPR calculator is used to find the number of permutations for the given value. Enter the values to the textbox and find the npr calculations. In probability we can use the permutations.

Features

By using this calculator we can find the number of permutations.
This is used in probability to calculate permutations.
This is free javascript calculator.
Copy the code from the given textarea and use it.

Preview

Enter values to the Textbox and then find the permutations.

Downloads

Javascript Code

<script type="text/javascript">
function cal()
{
var n=frm.txt.value;
var r=frm.txt1.value;
if(n=="" || r=="")
{
alert("Please Enter proper values");
frm.txt2.value="";
}
else
{
var f=1;
for(var i=1;i<=n;i++)
{
f=f*i;
}
var r1=n-r;
var res=1;
for(i=1;i<=r1;i++)
{
res=res*i;
}
var res1=f/res;
frm.txt2.value=Math.round(res1*Math.pow(10,2))/Math.pow(10,2);
}
}
function isInteger(s)
{
var i;
s=s.toString(s);
for(i=0;i<s.length;i++)
{
var c=s.charAt(i);
if(isNaN(c))
{
alert("Given value is not a number");
frm.txt.value="";
return false;
}
}
return true; } function isInteger1(s) {
var i;
s=s.toString(s);
for(i=0;i<s.length;i++)
{
var c=s.charAt(i);
if(isNaN(c))
{
alert("Given value is not a number");
frm.txt1.value="";
return false;
}
}
return true;
}
</script>

HTML Code

<form name="frm">
<table style="border:solid green 1px">
<tr><td>Enter the value of n</td>
<td><input type=text name="txt" size=12 onKeyup="isInteger()"></td></tr>
<tr><td>Enter the value of r</td>
<td><input type="text" name="txt1" size=12 onKeyup="isInteger1()"></td></tr>
<tr><td>The Result</td>
<td><input type="text" name="txt2" size=12 READONLY></td></tr>
<tr><td align=right><input type="button" value="Find" onclick="cal()"></td><td></td></tr>
<tr><td></td><td align=center>©<a href="https://www.hscripts.com" style="color:#3D366F;text-decoration:none;cursor:pointer;font-size:13px">hscripts.com</a></td></tr>
</table>
</form>

Release Date - 07-04-2008
Get free version without ©copyright link for just $5/-
For customization of this script or any script development, mail to support@hscripts.com

Usage

Copy the javascript code into the head part of your HTML page.
Create a HTML form using the above HTML code.
Here,the function "cal()" is used to find out the permutations for the specified values. The functions "isInteger()","isInteger1()" is used to check the given value is string or an integer.
npr calculation is used in probability.
Copy the code into your page and use it.

License

The javascript (misspelled as java script) is given under GPL License.
i.e. Free use for those who use it as it is.
Free, if your modification does not remove our copyright information and links.
Detailed License information can be found here.
You can purchase the script if your requirements does not meet GPL License terms.