Tryit Editor v2.9

Edit This Code:
<!DOCTYPE html>
<html>
<body>

<form action="action_page.php">
  <input type="number" name="points" step="3">
  <input type="submit">
</form>

<p><strong>Note:</strong> The step attribute of the input tag is not supported in Internet Explorer 9, and earlier versions.</p>

</body>
</html>