Path abbreviations in Windows

The abbreviated environment variable for Windows System directories is to create a simple abbreviation for the paths of common and fixed windows system directories to make it easier to enter or locate. By default, Windows systems are installed in the Windows directory of drive C on the computer, but this is not fixed. If your system is not installed in this directory, if the program wants to locate a system directory, you need to use the abbreviated environment variable in the directory. With these environment variables, programmers or system administrators can easily find the system directory path they want to use without having to know your system installation location in advance.
Below, I will introduce some common environment variables for the abbreviated Windows System directory: % systemdrive %
This indicates the disk partition of the Windows system, that is, the root directory of the drive letter installed on the Windows system, which is usually the root directory of the C disk. % Homedrive %
This is the same as the % systemdrive % feature described above. % SystemRoot %
It points to the directory of the Windows system, usually c: \ windows. % WINDIR %
Similar to % SystemRoot %, it points to the directory where windows is located. % ProgramFiles %
The path to program files, usually c: \ Program Files. % Commonprogramfiles %
Point to the common files directory, usually c: \ Program Files \ common files. % USERPROFILE %
Point to the user directory of the current account, usually c: \ Users and Settings \ current user name. % Homepath %
The function is the same as % USERPROFILE % above. % Allusersprofile %
Point to the user directories of all users, usually c: \ Users and Settings \ all users. % Appdata %
Point to the current user's application data directory, usually c: \ Documents ents and Settings \ current user name \ Application Data. Many articles will introduce a variable named % allappdata %, which points to c: \ Documents ents and Settings \ All Users \ Application Data, but this variable cannot be used. % Temp %
It points to the temporary file directory of the current user, usually c: \ Documents and Settings \ current user name \ Local Settings \ temp. % TMP %
And % Temp % point to the same. % Comspec %
Point to c: \ windows \ system32 \ cmd.exe, that is, the command prompt.