• 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

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