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Logical Operators (Corel Paradox and C++ Cross Reference Guide)

By Mike Prestwood

Corel Paradox versus C++: A side by side comparison between Corel Paradox and C++.

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.

Corel Paradox:

ObjectPAL logical operators:

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

Like VBA, ObjectPAL 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.

endIf

ObjectPAL Logical Operators 1 certification question.

C++:

C++ logical operators:

&&	and, as in this and that
\|\|	or, as in this or that
!	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.