JavaScript Statements

JavaScript Comments

JavaScript comment is used to explain JavaScript code.

It is very helpful for the programmers.

JavaScript comment is ignored for execution.

There are two types of comments in JavaScript.
(1.) Single-line Comment
(2.) Multi-line Comment

JavaScript Single line Comment

It is represented by double forward slashes (//). It can be used before and after the statement.

Program

<!DOCTYPE html>
<html>
<body>

<script>  
// It is single line comment  
document.write("hello world");
//alert("my first javascript code");  
</script>  

</body>
</html>

Try in editor

JavaScript Multi line Comment

Syntax

/*............*/

Program

<!DOCTYPE html>
<html>
<body>

<script>  
/* It is multi line comment.  */

/*
document.write("hello world");
alert("my first javascript code");  
*/
document.write("hello friends");
</script>  

</body>
</html>

Try in editor

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