JS Tutorial

JavaScript Comments

In JavaScript, comments are used to explain code, make notes, or prevent certain parts from running. Comments are ignored by the browser and do not affect how the code works.

✍️ Types of Comments

JavaScript supports two types of comments:

• Single-line comments → Start with //
• Multi-line comments → Start with /* and end with */

📌 Examples:

// This is a single-line comment
let name = "John"; // This is an inline comment

/* 
  This is a multi-line comment.
  It can span multiple lines.
*/
let age = 30;
  

🧪 Live Example:

Click the button to see how comments are ignored by JavaScript:

🧠 Best Practices

• Use comments to describe why something is done, not what is done (the code shows *what*).
• Don't overuse comments—clean, readable code is more powerful than too many notes.
• Use multi-line comments for section summaries or longer explanations.