(find.info.gz) Combining Primaries With Operators

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 Combining Primaries With Operators
 ==================================
 
    Operators build a complex expression from tests and actions.  The
 operators are, in order of decreasing precedence:
 
 `( EXPR )'
      Force precedence.  True if EXPR is true.
 
 `! EXPR'
 `-not EXPR'
      True if EXPR is false.
 
 `EXPR1 EXPR2'
 `EXPR1 -a EXPR2'
 `EXPR1 -and EXPR2'
      And; EXPR2 is not evaluated if EXPR1 is false.
 
 `EXPR1 -o EXPR2'
 `EXPR1 -or EXPR2'
      Or; EXPR2 is not evaluated if EXPR1 is true.
 
 `EXPR1 , EXPR2'
      List; both EXPR1 and EXPR2 are always evaluated.  True if EXPR2 is
      true.  The value of EXPR1 is discarded.  This operator lets you do
      multiple independent operations on one traversal, without
      depending on whether other operations succeeded.
 
    `find' searches the directory tree rooted at each file name by
 evaluating the expression from left to right, according to the rules of
 precedence, until the outcome is known (the left hand side is false for
 `-and', true for `-or'), at which point `find' moves on to the next
 file name.
 
    There are two other tests that can be useful in complex expressions:
 
  - Test: -true
      Always true.
 
  - Test: -false
      Always false.
 

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