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Update ch03-05-control-flow.md #774

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Feb 29, 2024
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5 changes: 3 additions & 2 deletions src/ch03-05-control-flow.md
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Expand Up @@ -234,8 +234,9 @@ again!

`for` 循环的安全性和简洁性使得它成为 Rust 中使用最多的循环结构。即使是在想要循环执行代码特定次数时，例如示例 3-3 中使用 `while` 循环的倒计时例子，大部分 Rustacean 也会使用 `for` 循环。这么做的方式是使用 `Range`，它是标准库提供的类型，用来生成从一个数字开始到另一个数字之前结束的所有数字的序列。

下面是一个使用 `for` 循环来倒计时的例子，它还使用了一个我们还未讲到的方法，`rev`，用来反转 range：
注意：以下代码不会踏足到数字 9 ,仅从一个数字开始到另一个数字之前
下面是一个使用 `for` 循环来倒计时的例子，它还使用了一个我们还未讲到的方法，`rev`，用来反转 range。

注意：以下代码不会踏足到数字 4，仅从一个数字开始到另一个数字之前。

<span class="filename">文件名：src/main.rs</span>

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