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Postcondition
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==Postconditions in object-oriented programming== In some software design approaches, postconditions, along with [[precondition]]s and class [[Invariant (computer science)|invariants]], are components of the software construction method [[design by contract]]. The postcondition for any routine is a declaration of the properties which are guaranteed upon completion of the routine's execution.<ref>[[Bertrand Meyer|Meyer, Bertrand]], ''[[Object-Oriented Software Construction]], second edition,'' Prentice Hall, 1997, p. 342.</ref> As it relates to the routine's contract, the postcondition offers assurance to potential callers that in cases in which the routine is called in a state in which its [[precondition]] holds, the properties declared by the postcondition are assured.
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