03-variables.html

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <title>Demo</title>
    </head>
    <body>
        <script type="text/javascript">
            // Let's learn variables

            /*
                A variable is a simple reference to a larger value.
                Simply put, a variable is a placeholder.

                Syntax for a variable
                var - defines statement
                = - assignment operator
                value - what is assigned to the variable
                var x = 100;
            */

            var myNumber = 100;
            document .write(myNumber);

            /*
                Variables are case sensitive
                All vars need to start with an underscore or a letter,
                vars CANNOT start with numbers.

                Only use letters, numbers and underscores.
            */

        </script>
    </body>
</html>