How to reverse a number in JavaScript

In this tutorial, we are going to see how to write a program to reverse the digits of a number in the JavaScript programming language.
Example :

Input: 123
Output: 321


Program to reverse a number in JavaScript
<!doctype html>
         function reverse()
               var tmp=0, x, nbr, y;
               nbr = Number(document.getElementById("Myinput").value);
               y = nbr;
               while(nbr > 0)
                     x = nbr%10;
                     nbr = parseInt(nbr/10);
                     tmp = tmp*10+x;
      Enter a number : <input id="Myinput">
      <button onclick="reverse()">Reverse</button>
Enter a number :
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