SharePoint number column should accept only numbers

Solution:

<script type="text/javascript">

        $(document).ready(function () {

            $('input[Title="ColumnName"]').keydown(function (e) {

                var keyCode = e.which; // Capture the event

                //190 is the key code of decimal if you dont want decimals remove this condition keyCode != 190

                if (keyCode != 8 && keyCode != 9 && keyCode != 13 && keyCode != 37 && keyCode != 38 && keyCode != 39 && keyCode != 40 && keyCode != 46 && keyCode != 110 && keyCode != 190) {

                    if (keyCode < 48) {

                        e.preventDefault();

                    }

                    else if (keyCode > 57 && keyCode < 96) {

                        e.preventDefault();

                    }

                    else if (keyCode > 105) {

                        e.preventDefault();

                    }

                }

            });

        });

       

</script>