How to write Multi-line Strings in JavaScript?

JavaScript Multi-line Strings

To write multi-line strings in JavaScript, there are two methods.

Use string concatenation operator +.
Use backslash at the end of each line, in a string, except for the last line.

Examples

An example to define a multi-line string using + operator is

var str = 'Eat one apple, ' +
          'one banana, ' + 
          'and one orange.';

An example to define a multi-line string using backslash at the end of each line is

var str = 'Eat one apple, \
          one banana, \
          and one orange.';

In the following example, we define a multi-line string using + operator, and display this string in a div.

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
</head>
<body>
    <div id="output"></div>
    <script>
        var str = 'Eat one apple, ' +
                    'one banana, ' + 
                    'and one orange.';
        document.getElementById('output').innerHTML = str;
    </script>
</body>
</html>

In the following example, we define a multi-line string using backslashes at the end of each lines in the string, and display this string in a div.

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
</head>
<body>
    <div id="output"></div>
    <script>
        var str = 'Eat one apple, \
                    one banana, \
                    and one orange.';
        document.getElementById('output').innerHTML = str;
    </script>
</body>
</html>

Conclusion

In this JavaScript Tutorial, we learned how to write multi-line strings in JavaScript, in different ways, with examples.