If it doesn't have foobar, it's gonna have a nonzero error code.

如果它没有 foobar，它将有一个非零错误代码。

Then, what happens when we if the file did not have foobar, like there was a nonzero error code, then we print " this file doesn't have any foobar, we're going to add one" .

然后，如果文件没有 foobar，就像有一个非零错误代码，然后我们打印“此文件没有任何 foobar，我们将添加一个”，会发生什么。

That will give a nonzero error command, so you will execute exit and that will stop the script instead of continue executing as if you were in a place that you are actually not in.

这将给出一个非零错误命令，因此您将执行 exit 并将停止脚本，而不是继续执行，就好像您处于实际不在的地方一样。