indexOf and lastIndexOf Array tutorial in JavaScript

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<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, shrink-to-fit=no">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>indexOf lastIndexOf JavaScript</title>
    <script>
        var a = ["Sanjay", "Aman", "Rehman", "Aman", "Rahul"];
        document.write(a + "<br><br>");

        var b = a.indexOf("Aman");
        var c = a.indexOf("Rehman");
        document.write(b + "<br><br>");
        document.write(c + "<br><br>");
        var d = a.indexOf("Aman", 2);
        document.write(d + "<br><br>");
        var e = a.indexOf("Neha", 2);
        document.write(e + "<br><br>");
        var f = a.lastIndexOf("Aman");
        document.write(f + "<br><br>");
        var g = a.lastIndexOf("Aman", 2);
        document.write(g + "<br><br>");
        var h = a.lastIndexOf("Neha");
        document.write(h + "<br><br>");
        var i = a.indexOf("Neha");
        document.write(i + "<br><br>");
    </script>
</head>

<body>
</body>

</html>



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