youdao

Each function can have a variable number of parameters.

每个函数都可以有若干数目不定的参数。

youdao

Of course, you could use constants directly in the function body instead of parameters if you don't need the additional flexibility.

当然，如果您不需要更多的灵活性，那么可以在函数主体中直接使用常量，而不是参数。

youdao

And this defines formal parameters of this function. Yup.

带有其它变量的括弧,这就是函数的形参。

麻省理工公开课 - 计算机科学及编程导论课程节选

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