Important lesson, so that there would be some predictability in the results and I would have some, if you will, smoke test for knowing whether or not I was getting, my code seemed to be working.

这很重要，因为这样我就可以预测,结果会是多少了，如果你愿意，我们可以做烟气试验,来看我的代码是否工作正常。

麻省理工公开课 - 计算机科学及编程导论课程节选

And then you can delete it once you're sure your code is working right.

当你们能够确定你们的代码运行正常的话，你们可以把这个“printf“,语句删除掉。

哈佛公开课 - 计算机科学课程节选