do_while_loop_ex.html

<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Do While Loop Ex</title>
  </head>
  <body>
    <script lang="javascript" type="text/javascript">
      var actualpin = "3456";
      var pin,
        count = 0;
      do {
        pin = prompt("Enter the pin : ");
        count++;
      } while (pin != actualpin && count < 3);
      if (pin == actualpin) {
        document.write("Welcome User.");
      } else {
        document.write("User Locked");
      }
    </script>
  </body>
</html>