Comments in JavaScript are notes written inside the code to explain what the program does. They are ignored by the browser and do not affect how the program runs.
Comments are very important because they make code easier to understand, especially when you or other developers read it later. Good comments help teams work better and reduce confusion.
Types of Comments in JavaScript
- Single-line comments
- Multi-line comments
Both types are used to explain code, describe logic, and make programs more readable.
The double slash // is used to write a single-line comment. Everything written after // on that line is ignored by JavaScript.
This type of comment is commonly used to explain short lines of code.
Multi-line comments start with /* and end with */. Everything written between them is treated as a comment.
These comments are useful when you want to describe complex logic or write detailed notes.
This example shows how comments can be used to temporarily disable code without deleting it. Developers often comment out code while testing or debugging programs.
Using comments properly makes your code cleaner, more understandable, and more professional.