How do I ensure the user is only allowed integer input?

我如何确保只允许用户输入整数？

youdao

PrefixInt prefixes a (user-configured) integer to its integer input stream.

PrefixInt 在它的整数输入流之前加上一个（用户配置的）整数。

youdao

If that integer divides the input integer, it adds not only that integer but the input integer divided by the counter-integer, and adds them to a list.

如果该整数可以除输入整数，则不仅要加上该整数而且要加上除以计数整数的输入整数，并将它们添加到一个列表中。

youdao

And then, if I want to find out if something's there, I do the same thing. But notice now, hash is converting the input into an integer.

然后，我想查找出某些元素是否在列表中,我做同样的事，但是现在注意，哈希是将输入转化成一个整数，所以，其思想是什么？

麻省理工公开课 - 计算机科学及编程导论课程节选

Go ahead and implement with the person next to you a program that takes as input from the user an integer called F and prints out the answer of the Celsius equivalent.

继续和你旁边的人执行程序,取来自用户的整数F作为输入,然后打印出与之等价的摄氏温度的答案。

哈佛公开课 - 计算机科学课程节选

b OK. In this example I'd use b. All right, as b get-- b is the thing that's changing as I go along here, but it could be things like, how many elements are there in a list if the input is a list, could be how many digits are there in a string if the input's a string, it could be the size of the integer as we go along. All right.?

好，在这个例子里我会用，因为b是一直在变的东西,但是也可能是如下情况：,如果输入是数组的话,变化的就是数组的元素数，如果输入是字符串的话,变化的就是字符串的长度，如果是integer的话,可能就是这个数的大小，对不对？

麻省理工公开课 - 计算机科学及编程导论课程节选