Logical operators

Logical operators link together two Boolean expressions (exception: NOT. This operator applies only to a single Boolean expression).

The result yielded by linking logical operators is always a Boolean value (TRUE or FALSE) that can be addressed by means of one of the names reserved for Boolean constants.

Operation	Operator
Negation	NOT
Or	OR
And	AND
Either Or (= exclusive or)	XOR

Rules:

• The rules for logic operations apply.

• NOT inverts the value of an expression.

Example

/A = TRUE
/B = 4
/C = 20
/D = A OR (B > C)
/E = A AND (B > C) 

Variable D is assigned the value TRUE, since one of the operands has the value TRUE in the OR operation.
Variable E is assigned the value FALSE, since only one of the two operands of the AND operation has the value TRUE.