本内容遵循CC 4.0 BY-SA版权协议 Python 提供了两种主要的循环方式，它们的应用场景有所不同。 老师的比喻：就像烧水，“只要水还没开（条件为 True），我就继续盯着（执行代码）”。 适用场景：你不知道具体要循环多少次，只知道“达到某个条件就停止”。

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