A small question for everyone! - China DOS Union Forum - China DOS Union

I'm just starting to learn DOS, and I ran into a small problem in a batch file that I'd like to ask about.
In DOS's Autoexec.bat, the PATH command is often used. Here's one PATH search command like this: path=c:.;d:.;..
What is the purpose of the two dots at the end of this command? Because I know a single dot is shorthand for the current directory, and two dots are shorthand for the parent directory. If this command tells DOS to search from the root directories of drives C and D, then which parent directory do the two dots represent?

Floor1　lws74	Posted 2003-04-22 00:00
初级用户　Posts 19　Credits 163
I'm just starting to learn DOS, and I ran into a small problem in a batch file that I'd like to ask about. In DOS's Autoexec.bat, the PATH command is often used. Here's one PATH search command like this: path=c:.;d:.;.. What is the purpose of the two dots at the end of this command? Because I know a single dot is shorthand for the current directory, and two dots are shorthand for the parent directory. If this command tells DOS to search from the root directories of drives C and D, then which parent directory do the two dots represent?

Floor2　Wengier	Posted 2003-04-23 00:00
系统支持　Posts 10,521　Credits 27,736
.. does indeed mean the parent folder. If the current location is the root folder, then .. will be ignored and not searched.

Floor3　lws74	Posted 2003-04-23 00:00
初级用户　Posts 19　Credits 163
So that's how it is. Thank you for the moderator's guidance!