what is diffrence between Control flow diagram & Data flow diagram

what is diffrence between Cont开发者_如何学编程rol flow diagram & Data flow diagram.

Please recoomend which is best for functional specification.

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Data flow diagrams are used to describe data flow within a system. They can depict transformations on data as well as storage locations. They trace the route that data travels in a system, from start to finish.

Control flow diagrams are used to describe the detailed logic of a business process or business rule. Control flow diagrams can easily illustrate decisions within the system via decision nodes that branch in different logical paths.

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CONTROL FLOW diagram is a diagram to describe the flow of of process or programm. DFD is siginificant modeling techniqeue for analyzing and constructing information process

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A data flow model is diagrammatic representation of the flow and exchange of information within a system.

A Control Flow Graph (CFG) is the graphical representation of control flow or computation during the execution of programs or applications.