A program generally executes from the first line of code to the last line of code. You can also execute certain procedures within the program according to specific conditions, or repeat a section of the program within a sub-procedure or function. You can use loops to repeat parts of a program as many times as necessary, or until a certain condition is met. These type of control statements are classified as Condition, Loop, or Jump statements.
程序通常是按照从第一行代码到最后一行代码的顺序执行。但是，也可以根据特定的条件仅执行程序中的某些过程，或重复执行某个子过程或函数中的部分程序。您可以使用循环来重复执行程序中的不同部分，直到满足某一条件为止。这些控制语句分为条件语句、循环语句和跳转语句。