Coupling (computer programming): Difference between revisions

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A module here refers to a subroutine of any kind, i.e. a set of one or more statements having a name and preferably its own set of variable names.

;{{anchor|Content coupling}}Content coupling (high): Content coupling is said to occur when one module uses the code of otheranother module, for instance a branch. This violates information hiding – a basic design concept.

;{{anchor|Common coupling}}Common coupling: Common coupling is said to occur when several modules have access to the same global data. But it can lead to uncontrolled error propagation and unforeseen side-effects when changes are made.

;{{anchor|External coupling}}External coupling: External coupling occurs when two modules share an externally imposed data format, communication protocol, or device interface. This is basically related to the communication to external tools and devices.