Comments

In JavaScript comment is a piece of text within a program that is not executed. It can be used to provide additional information to aid in understanding the code.

Single-line comments are created with two consecutive forward slashes //:

// Prints 5 to the console
console.log(5);

A single-line comment can also be used inline to comment after a line of code:

console.log(5); // Prints 5

Multi-line comments are created by surrounding the lines with /* at the beginning and */ at the end. Comments are good ways for a variety of reasons like explaining a code block or indicating some hints, etc.

/*  
The configuration below must be 
changed before deployment. 
*/

let baseUrl = 'localhost/taxwebapp/country';

This syntax can also be used to comment something out in the middle of a line of code:

console.log(/* IGNORED! */ 5); // Still prints 5

The code in the following that is not commented out will execute when the program is run:

Code
Output
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Run