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Logical Operators (Perl and Access VBA Cross Reference Guide)

By Mike Prestwood

Perl versus Access VBA: A side by side comparison between Perl and Access VBA.

 
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.

Perl: 

Perl logical operators:

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

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

Same as VB. Access VBA logical operators:

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

Access VBA 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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