And for reference, incidentally, in case you ever forget what the point of some exercise was, I'll almost always comment the code up top with a quick sentence or two that reminds you what this program does.

顺便作为参考，为了避免我们可能忘记一些代码的意思，我通常会用一两个简单的句子,在上面作出注释,那样会提醒我们这个程序是干嘛的。

哈佛公开课 - 计算机科学课程节选

i So I have up here at the top of my program a variable called i 0 of type int, and I have to initialize it up here to zero.

所以在程序的顶端我有一个int类型的变量,我需要把它初始化为。

哈佛公开课 - 计算机科学课程节选