JavaScript comments can be used to explain JavaScript code, and to make it more readable. JavaScript comments can also be used to prevent execution, when testing alternative code.

Nov 15, 2024 · JavaScript Comments are used to prevent code execution and are considered suitable for testing the code. JavaScript function add () { let x = 10 ; let y = 20 ; let z = x + y ; // console.log(x + y); console . log ( z ); } add ();

May 22, 2022 · There’s a special syntax JSDoc to document a function: usage, parameters, returned value. For instance: * Returns x raised to the n-th power. * @param {number} x The number to raise. * @param {number} n The power, must be a natural number. * @return {number} x raised to the n-th power. */ function pow(x, n) { ...

Dec 28, 2024 · JavaScript supports two types of comments: Single-line comments: When writing short inline comments, use //. Multi-line comments: For more detailed explanations or to temporarily deactivate code blocks, use /* */. This is a multi-line comment. It can span multiple lines. 1. Use Descriptive Comments.

Aug 30, 2021 · Let’s take a quick look at the two different types of JavaScript comment syntax. Single-line comments are written with two forward slashes (//): All characters immediately following the // syntax until the end of the line will be ignored by JavaScript.

JavaScript comments are annotations in the code that are completely ignored by the compiler. For example, Output. Here, // display "Programiz" to the screen is a comment. As a result, it is ignored by the JavaScript engine. In JavaScript, there are two ways to add comments to code:

Feb 4, 2023 · Learn how to use JavaScript comments to explain, document, and test your code. See examples of single-line and multi-line comments.

May 13, 2021 · Although a browser doesn’t execute Javascript comments, including comments is an important best practice in software development. Nearly all Javascript code can benefit from the addition of comments to explain how it works; adding useful comments is …

Aug 24, 2023 · In JavaScript, there are two types of comments, single-line comments, and multi-line comments. Let's start with single-line comments. A single-line comment starts with two forward slashes //. Here's an example: This line of code won't affect your program at all.

There are two ways to include comments in JavaScript. ECMA-Script standardizes for JavaScript the C-style comments for both single-line comments as well as block comments. The single-line comment starts with two forward-slash characters, such as: Syntax: // …