CSS/pla.html at main · Snowil-tuscano/CSS · GitHub

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<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        var str = prompt(" enter the string ")
        if (str === null || str === "") {
            document.write(" invalid op")

        }
        else if (str.toLowerCase() == str.toLowerCase().split("").reverse().join("")) { //split divide the array and rverse it and again joins it
            document.write(str + " String is palindrone")
        }
        else {
            document.write(str + " string is not plaindrone ")
        }

    </script>
</body>

</html>