IT SOLUTIONS
Your full service technology partner! 
-Collapse +Expand
JavaScript
Search JavaScript Group:

Advanced
-Collapse +Expand JavaScript Store

Prestwood eMagazine

July Edition
Subscribe now! It's Free!
Enter your email:

   ► KBWebsite Scri...JavaScript a...Beginners Co...   Print This     
  From the May 2014 Issue of Prestwood eMag
 
JavaScript Beginners Corner:
JavaScript Logical Operators
 
Posted 11 years ago on 2/11/2009
JavaScript Code Snippet:
 A flashcard from our JavaScript Flashcards Library
 A code snippet from our JavaScript Code Snippets Page

KB101886

Languages Focus: Logical Operators

Logical operators perform conditional and, or, and not operations. Some languages support both binary logical operators that link two and unary logical operators negate (make opposite) the truth value of its argument. Finally, some languages short circuit logic. For example, with this or that, if this is an expression returning true, then that is never executed.

JavaScript Logical Operators

JavaScript logical operators:

&& and, as in this and that
|| or, as in this or that
! Not, as in Not This

JavaScript always short circuits. Given the expression this || that, if this evaluates to true, then that is never executed.

Syntax Example:
//Given expressions a, b, c, and d:
if !((a && b) && (c || d)) {
  //Do something.
}

Comments

0 Comments.
Share a thought or comment...
 
Write a Comment...
...
Sign in...

If you are a member, Sign In. Or, you can Create a Free account now.


Anonymous Post (text-only, no HTML):

Enter your name and security key.

Your Name:
Security key = P1121A1
Enter key:
Code Contributed By Mike Prestwood:

Mike Prestwood is a drummer, an author, and creator of the PrestwoodBoards online community. He is the President & CEO of Prestwood IT Solutions. Prestwood IT provides Coding, Website, and Computer Tech services. Mike has authored 6 computer books and over 1,200 articles. As a drummer, he maintains play-drums.com and has authored 3 drum books. If you have a project you wish to discuss with Mike, you can send him a private message through his PrestwoodBoards home page or call him 9AM to 4PM PST at 916-726-5675 x205.

Visit Profile

 KB Article #101886 Counter
8420
Since 2/11/2009
Go ahead!   Use Us! Call: 916-726-5675  Or visit our new sales site: 
www.prestwood.com


©1995-2020 Prestwood IT Solutions.   [Security & Privacy]