You can edit / change the code and click run button <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>JavaScript Object</title> <script>var clicky_site_ids = clicky_site_ids || []; clicky_site_ids.push(101319977);</script><script async src="//static.getclicky.com/js"></script> <p>Click to see result:</p> <form> <input type="button" value="Click " onclick="printValue();"> </form> <script type="text/javascript"> function printValue() { var myValue = Number.MAX_VALUE; document.write ("Value of Number.MAX_VALUE : " + myValue ); } </script>