Skip to Main Content
JavaScript: The Definitive Guide, Fourth Edition
book

JavaScript: The Definitive Guide, Fourth Edition

by David Flanagan
November 2001
Intermediate to advanced content levelIntermediate to advanced
936 pages
68h 43m
English
O'Reilly Media, Inc.
Content preview from JavaScript: The Definitive Guide, Fourth Edition

null

The JavaScript keyword null is a special value that indicates no value. null is usually considered to be a special value of object type -- a value that represents no object. null is a unique value, distinct from all other values. When a variable holds the value null, you know that it does not contain a valid object, array, number, string, or boolean value.[9]

[9] C and C++ programmers should note that null in JavaScript is not the same as 0, as it is in those languages. In certain circumstances null is converted to 0, but the two are not equivalent.

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

JavaScript: A Beginner's Guide, Fourth Edition, 4th Edition

JavaScript: A Beginner's Guide, Fourth Edition, 4th Edition

John Pollock
Coding with JavaScript For Dummies

Coding with JavaScript For Dummies

Chris Minnick, Eva Holland

Publisher Resources

ISBN: 0596000480Supplemental ContentCatalog PageErrata