Logical Operators (PHP and Corel Paradox Cross Reference Guide)

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.

PHP:   and, &&, or, ||, !, Xor PHP logical operators: and, && and, as in this and that or, || or, as in this or that ! 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 !((a && b) && (c || d)) {   #Do something. };

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