tut_50.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>JavaScript Sting Function</title>
</head>
<body>
    <script>
        var str ="This is a string"
        console.log(str);
        var position =str.indexOf('is');
        console.log(position);
        position=str.lastIndexOf('is');
        console.log(position);
        // substring from a string
        // var substr=str.slice(2,6);
        var substr1 =str.substr(1,7);
        console.log(substr1);
        // var replaced =str.replace('string','Saksham');
        // console.log(str);
        // console.log(replaced);
        // console.log(str.toUpperCase());
        // console.log(str.toLowerCase());
        // var newString =str.concat(' New String');
        // console.log(newString);
        // var strWithwhitespaces="     this    contains   whitespaces  "
        // console.log(strWithwhitespaces);
        // console.log(strWithwhitespaces.trim());
        // var char3 =str.charAt(2);
        // console.log(char3);
        console.log(str[3]);


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