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# 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.

 Enter the value of n Enter the value of r The Result ?hscripts.com

Javascript Code
<!-- Script by hscripts.com -->
<!-- More script @www.hscripts.com -->
<script type="text/javascript">
function cal()
{
var n=frm.txt.value;
var r=frm.txt1.value;
if(n=="" || r=="")
{
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>
<!-- Script by hscripts.com -->

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>
<tr><td align=right><input type="button" value="Find" onclick="cal()"></td><td></td></tr>
<tr><td></td><td align=center>&copy;<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
• 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.