leetcode lowest common ancestor of a binary search tree为啥不能直接用while

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参考技术A leetcode lowest common ancestor of a binary search tree为什么不能直接用while
这是可以的。
当while循环开始后,先判断条件是否满足,如果满足就执行循环体内的语句,执行完毕后再回来判断条件是否满足,如此无限重复;直到条件不满足时,执行while循环后边的语句。

就和在处理矩阵时,两个或者更多for循环嵌套一样,多个while可以用来处理维数大于2的编程问题。

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