In JavaScript, comments are used to add explanatory notes or annotations within the code. They are ignored by the JavaScript interpreter and serve only for human readability. There are two types of comments in JavaScript:
- Single-line comments: These begin with “//” and continue until the end of the line.
// This is a single-line comment
var x = 5; // This comment explains the purpose of this variable assignment
- Multi-line comments: These begin with “/” and end with “/”. They can span multiple lines.
/*
This is a multi-line comment.
It can be used for longer explanations or commenting
out multiple lines of code.
*/
var y = 10; /* This is a multi-line comment inline with code */
Comments are invaluable for improving code readability, explaining complex sections, and temporarily disabling code during testing or debugging.
