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   Operators

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Logical Operators

   Table 10-6. Logical Operators
   Example   Name Result
   $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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