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

I don't have to go read what it printed out in the screen. This has returned a value that I can use. Because I could do a test to say, is this a return value? If it's not, I'll do something else with it. So the binding is still there, it simply doesn't print it out.

我不想读到屏幕中打印出来的这行字,程序返回过一个我能够使用的值,因为我可以做个小测试，来说明这是否是返回的值，如果不是，我可以做一些其它的事,而这个绑定依然在这儿，没有打印任何东西。

麻省理工公开课 - 计算机科学及编程导论课程节选

If you've read through that material and you should have read through it by now you know that we have a value in music.

如果你通读这个材料,现在你应该也已经通读过了这一部分,你应该知道我们的音乐中有一种音符值

耶鲁公开课 - 聆听音乐课程节选

Now what I'm going to try and do is read in a set of values, but I'm going to give a type of value as well as the messages.

现在我要做的是输入一些值,并关注异常,我会输入消息以及一种其他的值。

麻省理工公开课 - 计算机科学及编程导论课程节选