js2.html

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <meta name="viewport"content="width=device-width,initial-scale=1.0">
        <meta http-equiv="X-UA-Compatible"content="ie-edge">
        <title>javascript string functions</title>
    </head>
    <body>
        <script>
            str="is tHIS string    ";
            console.log("index of desired char is "+ str.indexOf('r'));
            console.log("last index of desired char is "+ str.lastIndexOf('is'));
            console.log(str.replace('string','harry'));
            console.log(str.toUpperCase());
            console.log(str.toLowerCase());
            console.log(str.concat(' new one'))
            console.log(str.trim());
            console.log(str.charAt(5));
        </script>
    </body>
</html>