JavaScript/JS4.html at main · WebFusionCode/JavaScript · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>JavaScript String Function</title>
</head>
<body>


    <script>
        // this is a normal string
        var str = 'This is a String';
        console.log(str);

        // Getting position of the string
        // first occurence of a sub string
        var position =  str.indexOf('is');
        console.log(position);

        // Getting position of the string
        // first occurence of a sub string
        // Index always strat with 0
         position =  str.lastIndexOf('is');
        console.log(position);

        // substring from a string
        // var substr = str.slice(1,6);
        // var substr = str.substring(1,6);
        var substr1 = str.substr(1,6);
        // the substr is the starting fetch point but the 2 vlaue is for limit

        console.log(substr1);

        // if we want to replace a substring with a string like in first code there was written as this is a string i want to repace the string my name harsh
        // var replaced = str.replace('string', 'Harsh');
        // console.log(str);
        // console.log(replaced);
        console.log(str.toUpperCase())
        console.log(str.toLowerCase())

        // this is as same a how we add strings using + here we are using concat syntax to do so
        var newString = str.concat('New String');
        console.log(newString)

        var strWithWhiteSpaces = '  this is a     str    with   white spaces';
        console.log(strWithWhiteSpaces)
        console.log(strWithWhiteSpaces.trim())

        // Now to check the character of the string by using the numbers like slice or substr

        // var char3 = str.charAt(2)

        // this charcodeat gives you the charcter code
        var char3 = str.charCodeAt(2)
        console.log(char3)


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