NAME
  Boolean Operators

SYNOPSIS
  result = expression1 boolean-operator expression2
      o boolean-operator    Any of the following Boolean operators:
          NOT                 Bit-wise complement
          AND                 Conjunction
          OR                  Disjunction (inclusive "or")
          XOR                 Exclusive "or"
          EQV                 Equivalence
          IMP                 Implication
      o Each operator returns results as indicated in the following truth
        table. T is true (nonzero); F is false (zero):
          Expression1  Expression2  NOT  AND  OR   XOR  EQV  IMP
          -----------  -----------  ---  ---  ---  ---  ---  ---
          T            T            F    T    T    F    T    T
          T            F            F    F    T    T    F    F
          F            T            T    F    T    T    F    T
          F            F            T    F    F    F    T    T
      o Boolean operations are performed after arithmetic and relational
        operations in order of precedence.
      o Expressions are converted to integers or long integers before a
        Boolean operation is performed.
      o If the expressions evaluate to 0 or -1, a Boolean operation returns
        0 or -1 as the result. Because Boolean operators do bit-wise
        calculations, using values other than 0 for false and -1 for true may
        produce unexpected results.

DESCRIPTION
  Boolean operators perform bit manipulations, Boolean operations, or tests on
  multiple relations. They return a true (nonzero) or false (zero) value to be
  used in making a decision.

SEE ALSO
  none