Add this code to the end of the iterator loop

将下列代码添加到迭代器循环的底部

youdao

The REPEAT statement defines a set of statements to be executed until a condition that is evaluated at the end of the REPEAT loop is true.

REPEAT 语句定义了一个语句集合，如果在 REPEAT 循环结束时某个条件的求值结果为 true，那么就将执行这个语句集合。

youdao

Once each time. Right? I only do one swap potentially, it-- though not one potentially, each time at the end of the loop I do a swap.

每次循环做一次，对么？我其实,就可能做了一次交换，也许并不是可能，每次循环的结束我都得做一次交换。

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