Error in adding commas to string [Resolved]

<script src="https://code.jquery.com/jquery-1.11.3.js"></script>
    <script type="text/javascript">
        $(document).ready(function () {
            //Your string
            var strname = "YYYYNN";
            //variable to hold the result
            var result = "";
            //Loop through each items
            for (var i = 0; i < strname.length; i++) {
                result = result + strname.charAt(i) + ",";
            }
            //output the result
            alert(result.slice(0, -1));
        });
    </script>

Thanks,
A2H
My Blog

alert("YYYYNN".split(''));

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Thanks & Regards,
RNA Team