It's totally legit to cull a function, get back a value, do nothing with it other than compare it to another value.

挑选一个函数是完全合法的，返回一个值，用它来做些事情而不是用它与其它的值比较。

哈佛公开课 - 计算机科学课程节选

Well this is leading up to why I want to gather things together in classes to start with.

收集起来的话题了,在Python中这么输入,然后得到值是完全合法的。

麻省理工公开课 - 计算机科学及编程导论课程节选

X So here I'm declaring another variable called X, and this is totally legitimate because I already know that if I'm implementing a function like swap or increment, I can absolutely take input.

这里我声明另一个变量，这个完全是合法的因为我已经知道,如果我执行一个像swap，或，increment的函数，我完全可以携带输入。

哈佛公开课 - 计算机科学课程节选