How to get Length of a String in JavaScript?

JavaScript String Length

To get length of a string in JavaScript, read the length property of the string instance.

Syntax

The syntax to read length property of a string instance str is

str.length

Examples

The following is a quick example to get the length of a string in JavaScript.

var str = 'hello world';
var len = str.length;

In the following example, we take a string str in script, and find its length. We shall display the string length in a div.

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
</head>
<body>
    <div id="output"></div>
    <script>
        var str = 'hello world';
        var len = str.length;
        document.getElementById('output').innerHTML = 'String length : ' + len;
    </script>
</body>
</html>

Conclusion

In this JavaScript Tutorial, we learned how to get the length of a string in JavaScript, using length property, with examples.