It's an empty loop, nothing is done with the value read.

这是一个空循环，什么也不做的阅读价值。

youdao

Before closing the middle loop, which represents rows, test whether the row element is empty.

在关闭中间循环之前(该循环表示行)，测试row元素是否为空。

youdao

Is the loop non-empty?

循环体是否为空？

youdao

Is the loop non-empty?

循环体是否为空？

youdao