Complete-Web-Development-BootCamp/tut25.htm at master · SakshamAgg1709/Complete-Web-Development-BootCamp · GitHub

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<!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>String functions</title>
</head>
<body>


    <script>
        var str = "This is a string"
        console.log(str);

    //    Index count always start from 0

        // First occurence of  a substring like 'is' is on 2nd place in the string str
        var position = str.indexOf('is');
        console.log(position)
        // Last occurence of  a substring like 'is' is on 2nd place in the string str
         position = str.lastIndexOf('is');
        console.log(position)

        // Substring from a string

        // This will print 1st 2nd 3rd 4th 5th and 6th character from the string str
        var substr = str.slice(1,7);

console.log(substr)

        // It will also print the same but difference between slice and substring is that slice can take -ve values but substring can't take negative values
        var substr2 = str.substring(-1,7);
       console.log(substr2)

    //    It will start from 1st and extract the substrings till 7th position
        var substr1 = str.substr(1,7)
        var substr1 = str.substr(1,3);
        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 strwithwhitespace = "     This contains whitespaces      "
        console.log(strwithwhitespace);
        // It will remove the white spaces only at the beginning and the end
        console.log(strwithwhitespace.trim());

var char3 = str.charAt(2);
var char3 = str.charCodeAt(2);
console.log(char3);

console.log(str[3]);


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