What are the common characteristics of program control structure in computer?

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The common characteristic of program control structure is that there is only one entrance and one exit; program control structure refers to a series of actions executed in a certain order to solve a problem; it has been proved in theory and practice that no matter how complex the algorithm is, it can be constructed through three basic control structures: sequence, selection and loop.

The common feature of the three basic control structures of the program is that there is only one entrance and one exit.

The program control mode refers to the data transmission mode under the program control. Program control structure refers to a series of actions performed in a certain order to solve a problem. It is proved in theory and practice that no matter how complex the algorithm is, it can be constructed by three basic control structures: sequence, selection and loop. Each structure has only one entrance and exit. A multi-layer nested program composed of these three basic structures is called a structured program.

The characteristic of the program is that it starts with an entrance and ends with an exit, during which the flow direction of the program can be controlled by sequence, selection and circulation. The three structures can write very complex programs, and selections and loops can be nested.

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