Comments

JavaScript supports two styles of comments.

Single-line comment - Any text between a // and the end of a line is treated as a comment and is ignored by JavaScript.
Multi-line comment - Any text between the characters /* and */ is also treated as a comment; these comments may span multiple lines but may not be nested.

The following lines of code are all legal JavaScript comments:

// This is a single-line comment.
/* This is also a comment */ // And here is another.
/*
* This is yet another comment.
* It has multiple lines.
*/