In computer science, and more generally in system design, structured set of elementary operations through which it is possible to describe the execution of a procedure or solution of a problem. The basic structures of these transactions consist of: sequence, choice (including alternatives), iteration, execution of instructions. The fundamental features of an algorithm are: correctness finitude and efficiency. The algorithms are describable with different formalisms and graphical methods (p. Eg. The flow-chart), to be finally encoded in a Program or corresponding software module
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