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. result = expression1 boolean-operator expression2 - 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 - 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 - Boolean operations are performed after arithmetic and relational operations in order of precedence. - Expressions are converted to integers or long integers before a Boolean operation is performed. - 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.