JavaScript Syntax

  • JavaScript comments are used to add explanatory notes or remarks within the code. They are not executed and do not affect the functionality of the program. There are two main types of comments in JavaScript:

Single-line comments

  • Single-line comments are created using two forward slashes //.
  • They are used to comment on a single line of code.
javascript
  // This is a single-line comment
  var x = 5; // Assigning the value 5 to variable x

Multi-line comments

  • Multi-line comments are enclosed between /* and */.
  • They are used to comment on multiple lines of code.
javascript
  /*
  This is a multi-line comment.
  It can span multiple lines.
  */
  var y = 10; // Another statement after the multi-line comment

Here’s a full example combining both single-line and multi-line comments:

javascript
// This is a single-line comment
var x = 5; // Assigning the value 5 to variable x

/*
This is a multi-line comment.
It can span multiple lines.
*/
var y = 10; // Another statement after the multi-line comment
  • Comments are essential for making code more readable and understandable, both for the original developer and for others who may need to work with the code later. They help document the code, explain complex logic, and provide context for future modifications.