【MIT 公开课】Computer Science and Programing Lession3

最新推荐文章于 2017-04-17 22:19:35 发布

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本文探讨了程序终止的概念及其意义，并详细介绍了for循环的工作原理。for循环通过对一系列元素进行迭代处理，使得每次迭代都能针对当前元素执行特定操作。

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lession3 is about Common Code Patterns: Iterative Programs

1.What does it mean for a program to terminate?

answer:

a program need to terminate when it comes to a condition otherwise the program will run forever ,it's meaningless.

the answer for reference form MIT is:

Either the program will return a value, or throw an exception. A program that does not terminate runs indefinitely, typically because it's gotten stuck in a loop.

2.What is a for loop?

answer:

for loop is iterative when the program from begin of the condition to end of the condition.

the answer for reference form MIT is:

A for loop takes some sort of iterable object (a list, tuple, or string) and performs its function once for each item in that object. Any function that depends on the input can have a different result at each step, since the input is the current item.