javascript-practice/js4.html at master · jonathanheemstra/javascript-practice · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
    <title></title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/3.0.3/handlebars.min.js"></script>
    <script src="http://code.jquery.com/jquery-1.11.3.min.js"></script>
    <link href="style.css" rel="stylesheet">
  </head>
  <body>
<h1>When will you be twice your age now?</h1>
<script type="text/javascript">
  var yourAge = prompt("What's your age today?")
  function multiplyByTwo(age) {
    var c = age * 2;
    var d = c + 2016;
    document.write(d);
  }
  multiplyByTwo(yourAge)
</script>
  </body>
</html>