Why is it not working

Question

var num=prompt("Enter a number to check whether it is a duck number or not");
// a duck no. is a no. which contains 0
var n=num
var g=1,r;
while (n!=0){
r=n%10;
if(r==0)
g=0;
}
if(g==0)
alert("The number "+num+" is a duck number ");
else
alert("The number "+num+" is not a ducknumber");

Answer 1

I think, its beacuse you haven't initialised r,
var g=1,r=0;

Answer 2

Anytime :-)

Answer 3

thanks