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


The logical operators are:  
:The logical operators are:  
:<tt>&&</tt> Logical AND (and)
::<tt>&&</tt> Logical AND (and)
:<tt>||</tt> Logical OR (or)
::<tt>||</tt> Logical OR (or)


;Considerations:
:;Considerations:
:* Two subexpressions joined by a logical operator form a ''logical expression''.
::* Two subexpressions joined by a logical operator form a ''logical expression''.
:* Logical expressions resolve to a Boolean value: ''1/0'' or ''TRUE/FALSE''.
::* Logical expressions resolve to a Boolean value: ''1/0'' or ''TRUE/FALSE''.
:* Use parentheses--<tt>()</tt>--to group expressions logically and to join multiple expressions.
::* Use parentheses--<tt>()</tt>--to group expressions logically and to join multiple expressions.
:* Parentheses are used in pairs; each open parenthesis "(" requires a closing parenthesis ")".
::* Parentheses are used in pairs; each open parenthesis "(" requires a closing parenthesis ")".
:* For example:
::* For example:
::  <tt>((<expression1> && <expression2>) || (<expression3> && <expression_4>))</tt>
:::  <tt>((<expression1> && <expression2>) || (<expression3> && <expression_4>))</tt>
|}

Revision as of 20:52, 10 June 2011

LOGICAL_OPERATOR

Logical operators can be used to build more complex expressions.
The logical operators are:
&& Logical AND (and)
|| Logical OR (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> && <expression2>) || (<expression3> && <expression_4>))