Javascript Comments

Javascript comments

Created By: chatGPT

In JavaScript, comments are used to make the code easier to understand. They are ignored by the JavaScript engine, meaning that they do not affect the execution of the code. There are two types of comments you can use: single-line comments and multi-line comments.

// This is a single-line comment
let x = 10; // This will set x to 10

/* This is a multi-line comment
   You can write comments that span multiple lines
*/

Single-line comments start with //. Anything on the line after // will be treated as a comment. This is useful for short explanations or notes.

// This variable holds the user's name
let userName = 'Alice';

Multi-line comments start with /* and end with */. This type of comment is ideal for longer explanations that may take up several lines.

/*
   This function calculates the area of a rectangle
   It takes two parameters: width and height
*/
function calculateArea(width, height) {
    return width * height;
}

Using comments effectively in your code is essential for maintaining and debugging it. It enhances readability and helps others (or you in the future) understand the code quickly.

// TODO: Add error handling for the function
function fetchData(url) {
    // Fetching data from the given URL
    return fetch(url)
        .then(response => response.json());
}