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<tt>LOGICAL_OPERATOR</tt>
====LOGICAL_OPERATOR====
:Logical operators can be used to build more complex expressions.
:Logical operators can be used to build more complex expressions.



Latest revision as of 00:43, 18 October 2011

LOGICAL_OPERATOR

Logical operators can be used to build more complex expressions.
The logical operators are:
AND
OR
Considerations
  • Two subexpressions joined by a logical operator form a logical expression.
  • Logical expressions resolve to a Boolean value: 1/0 or TRUE/FALSE.
  • Use parentheses--()--to group expressions logically and to join multiple expressions.
  • Parentheses are used in pairs; each open parenthesis "(" requires a closing parenthesis ")".
  • For example:
((<expression1> AND <expression2>) OR (<expression3> AND <expression_4>))