First of all, having read in that value, I can check to see, is it of the right type?

首先，读一下这个值，我们可以来检查看看是不是正确的类型？

麻省理工公开课 - 计算机科学及编程导论课程节选

n I know this is okay because I'm not using n until I myself put something there.

我知道这是正确的因为我不会使用,直到我给它赋值了。

哈佛公开课 - 计算机科学课程节选

The format is the same. I'm going to ask for some input, and then I am going to use that procedure to check, is this the right type of value. And I'm trying to use that to do the coercion if you like. Same thing if it works, I'm going to skip that, if it not, it's going to throw the exception.

格式是一样的，我需要一些输入,然后我要用一个过程来检查,是否是正确的值,然后你就可以做强制转换了,如果能运行，那是一样的，我打算跳过这段，如果不正确，那就会抛出一个异常。

麻省理工公开课 - 计算机科学及编程导论课程节选

This is a true or false value.

这是一个正确或错误的值。

哈佛公开课 - 计算机科学课程节选

It becomes a 13 and that is consistent with the code and it also doesn't crash because now y has been assigned to the correct value.

它变成了一个13，这个和代码是一致的,程序也不会崩溃,因为现在y被赋了正确的值。

哈佛公开课 - 计算机科学课程节选

It's a little more readable because I'm using a Boolean value that tells me, the programmer, this is true or this is false.

它更具有可读性一点,因为我使用了一个bool值，它告诉我或程序员，这是正确的或这是错误的。

哈佛公开课 - 计算机科学课程节选

And in fact, now let me ask those two questions about this piece of code. First question is, for what values of integers-- we're going to assume integers-- but for what values of x does this code terminate? And the second question is, for what values of x does it give me back the right answer?

实际上，让我关于这块代码问两个问题,第一个问题是，对于什么样的整数值，我们会假设是整数,对于x的什么值程序,会最终终止？第二个问题是,对于x的什么值程序,会返回正确答案？

麻省理工公开课 - 计算机科学及编程导论课程节选