JavaScript Comments

JavaScript comments is used to make the code more readable and code is easily understand by other users. JavaScript support single-line as well as multi-line comments. The comment code is not display in the web browesr.

You can add Single-line comments by using double forward slash (//) as following example.

For Example

<script>
    // This is my first JavaScript program
    document.write("Hello World!");
</script>

Output

You can add multi-line comments begins with a slash and an asterisk (/*) and ends with an asterisk and slash (*/) as following example.

For Example

<script>
    /* This is my first program 
    in JavaScript */
    document.write("Hello World!");
</script>

Output