Uncaught TypeError: $(...).datetimepicker is not a function

Question

Hi

  Uncaught TypeError: $(...).datetimepicker is not a function
    at HTMLDocument.<anonymous>

<script type="text/javascript">
            $(function () {
                $('#datetimepicker3').datetimepicker({
                    format: 'LT'
                });
            });
        </script>

 

Thanks