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Logical OperatorsTable 10-6. Logical Operators | Example | Name | Result |
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| $a and $b | And | TRUE if both $a and $b are TRUE. | | $a or $b | Or | TRUE if either $a or $b is TRUE. | | $a xor $b | Xor | TRUE if either $a or $b is TRUE, but not both. | | ! $a | Not | TRUE if $a is not TRUE. | | $a && $b | And | TRUE if both $a and $b are TRUE. | | $a || $b | Or | TRUE if either $a or $b is TRUE. |
The reason for the two different variations of "and" and "or" operators is that they operate at different precedences. (See Operator Precedence.)
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