Well, you can implement this in a few different ways but here's one approach that uses some int counter=0 of the syntax we just looked at, int counter equals 0.

当然，你可以有好几种方法来实现这一目标,但是其中一种方法,只需要用到我们刚刚看到的那种语法。

哈佛公开课 - 计算机科学课程节选