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   ► KBProgrammingVB.NetLanguage Basics   Print This     
  From the January 2010 Issue of Prestwood eMag
 
VB.Net Language Basics:
VB.Net Logical Operators
 
Posted 12 years ago on 2/11/2009
VB.Net Code Snippet:
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KB101889

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.

VB.Net Logical Operators

VB.Net logical operators:

And and, as in this and that No Short Circuit
AndAlso and, as in this and that short circuits
Or or, as in this or that No Short Circuit
OrElse or, as in this or that short circuits
Not Not, as in Not This
Xor either or, as in this or that but not both

Syntax Example:
'Given expressions a, b, c, and d:
If Not (a and b) and (c or d) Then
  'Do something.
End If

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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.

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Linked Certification Question(s)

The following are practice certification questions with answers highlighted. These questions were prepared by Mike Prestwood and are intended to stress an important aspect of this KB post. All our practice questions are intended to prepare you generally for passing any certification test as well as prepare you for professional work.

Beginner

1 Beginner Level Question

Question #1: Multiple Choice

What are the logical operators?

Answer:
1. 
  • And
  • Or
  • Not
2. 
  • &
  • &&
  • |
  • ||
  • !
  • ^
3. 
  • And
  • AndAlso
  • Or
  • OrElse
  • Not
  • XOR
4. 
  • And
  • Or
  • Not
  • XOR
5. 
  • &
  • |
  • !
  • ^

 KB Article #101889 Counter
9993
Since 2/11/2009
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