JavaScript Commenting : Exploring the Different Types of Code Comments

In JavaScript, there are different ways to add comments to your code. Comments are used to add explanatory notes or to

disable certain sections of code temporarily. 

The following are the different types of commenting in JavaScript:

Single-Line Comments:

Single-line comments start with "//" and extend until the end of the line. They are used to add comments on a single

line.

example:

// This is a single-line comment

var number = 42; // Assigning a value to the variable

Multi-Line Comments:

Multi-line comments start with "/*" and end with "*/". They can span across multiple lines and are useful for adding

comments on multiple lines or commenting out blocks of code.

example:

/*

This is a

multi-line comment

*/

var name = "zaheer";

/* Commenting out a block of code temporarily

if (condition) {

// code block

}

*/

Documentation Comments (JSDoc):

Documentation comments follow a specific format known as JSDoc. They are used to generate documentation from code and

typically include descriptions, annotations, and tags. While these comments don't affect the behavior of the code

directly, they provide information for tools and libraries that can generate documentation.

example:

/**

* Calculates the sum of two numbers.

* @param {number} a - The first number.

* @param {number} b - The second number.

* @returns {number} The sum of the two numbers.

*/

function add(a, b) {

return a + b;

}

note:

JavaScript also recognizes the HTML comment opening sequence "<!--" and the HTML closing sequence "-->" is not recognized by JavaScript so it should be written as " //-->"

It's important to use comments effectively to improve code readability, document important details, and make it easier

for others to understand and maintain the code. However, excessive or unnecessary commenting should be avoided to keep

the code clean and concise.