The GOTO label statement can unconditionally exit from a loop and transfer control to the executable statement or statement block that follows the specified statement label.

GO TO标签语句可以无条件地退出循环，并将控制权转移到跟在指定的语句标签之后的可执行语句或语句块。

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To the control transfer, a variable REASON is introduced, which is recorded every state of statement execution.

为了描述控制转移，引入一个变量REASON，它记录每个语句执行结束后，该语句的执行状态。

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