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   ► KBTo/From GuidesC++/CLI  Print This     

Logical Operators (C++/CLI and VB Classic Cross Reference Guide)

By Mike Prestwood

C++/CLI versus VB Classic: A side by side comparison between C++/CLI and VB Classic.

 
Operators
 

A language symbol used for assignment, comparison, computational, or as a logical.

Logical Operators

[Other Languages] 

Languages Focus

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.

C++/CLI: 

Same as C++ and Java. C# logical operators:

& and, as in this and that No Short Circuit
&& and, as in this and that short circuits
| or, as in this or that No Short Circuit
|| or, as in this or that short circuits
! Not, as in Not This
^ either or, as in this or that but not both

Syntax Example:
//Given expressions a, b, c, and d:
if !((a && b) && (c || d)) {
  //Do something.
}
VB Classic:   and, or, not

VB Classic logical operators:

and and, as in this and that
or or, as in this or that
Not Not, as in Not This

VB Classic never short circuits. Given the expression this or that as well as this and that, if this evaluates to false, then that is still executed.

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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