Comments in JavaScript

In this tutorial, we will learn how to write comments in JavaScript. We will go through the different types of comments and how to use them in a program.

What are Comments

Comments in JavaScript are non-executable statements that are used to annotate the code, provide explanations, and make it more readable. They are ignored by the JavaScript engine during execution.

Syntax

The syntax to define comments in JavaScript is:

// Single line comment
/* Multi-line comment
   continues here */

Example 1: Single line comments

  1. Single line comments in JavaScript start with // and continue to the end of the line.
  2. They are used to add short explanations or notes within the code.

JavaScript Program

// Print Hello, World! to the console
console.log('Hello, World!');

Output

Hello, World!

Example 2: Multiline comments

  1. Multiline comments in JavaScript start with /* and end with */.
  2. They can span multiple lines and are used for longer explanations or to comment out blocks of code.

JavaScript Program

/* Print Hello, World! to the console
   This is a multi-line comment */
console.log('Hello, World!');

Output

Hello, World!