First, there are no execute elements.

首先，它没有执行元素。

youdao

As can be seen, there is no execute bit for the group, and only user alpha may execute the file.

可以看到，没有为组设置执行位，只允许用户alpha执行此文件。

youdao

"No eXecute" is a hardware functionality used to block malware code execution by marking data pages.

是一种通过将数据页标记为不可执行来防止恶意代码执行的硬件机制。

youdao

So conceptually the key difference here, besides the syntax looking slightly different, it just means that if you want a chunk of code to execute no matter what initially, ; you can use the do while loop; if you want to check a condition first, you can use the while loop.

所以概念上，则关键的区别是，除了语法看起来有点不同，它的意思是如果你想要一段代码,最初无论如何都要执行，你就可以用do，while循环;,如果你想要先检查条件，你可以用while循环。

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