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Program to find the reverse of a number in java script

<html>
<head><h2><center>program to find the reverse of a number</h2></center></head>
<body>
<script type="text/javascript">
n=parseInt(prompt("enter the number"," "));
rev=0;
x=n;
while(n>0)
{
m=n%10;
rev=parseInt(rev*10+m);
n=parseInt(n/10);
}
document.write("reverse of a given number "+x+"  is "+rev);
</script>
</body>
</html>

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