How many halvings? · 要减半几次？
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Python Basics · Python 基础 · While loops · while 循环 →
English
How many halvings?
n starts at 40. Halve it with n = n // 2 until it reaches 0, counting the steps in steps.
// divides and throws the remainder away, so 5 // 2 is 2. Counting how many times a loop went round needs its own variable, going up by one each turn.
中文
要减半几次？
n 从 40 开始。用 n = n // 2 不断减半直到变成 0，把步数记在 steps 里。
// 相除并丢掉余数，所以 5 // 2 是 2。要数循环转了多少轮，需要一个自己的变量，每轮加一。
n starts at 40. Halve it with n = n // 2 until it reaches 0, counting the steps in steps. · n 从 40 开始。用 n = n // 2 不断减半直到变成 0，把步数记在 steps 里。
Click Run to see the output here. · 点击“运行”查看此处输出。