Variables (Let & Const) tutorial in JavaScript

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<head>
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    <title>Variable Let & Const</title>
    <script>
        //variable with "var"
        var firstname = "Hello<br>";
        var firstname = "How are you ?";    //We can redeclare variable name with "var"
        firstname = "World<br>";
        document.write(firstname);

        //variable with "let"
        let secondname = "second<br>";
        // let secondname = "shflsh<br>";  //We can not redeclare variable name with "let"
        secondname = "name<br>";
        document.write(secondname);

        //constant variable with "const"
        const thirdname = "Hello<br>";
        // const thirdname = "Hello brother<br>";  //We can not redeclare variable name with "const"
        // thirdname = "How much time ?<br>";  //We can not reassign variable value with "const"
        document.write(thirdname);
    </script>
</head>

<body>
    <h1>Variable Let & Const</h1>
</body>

</html>



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