A newbie question: about Set - China DOS Union Forum - China DOS Union

Re crazyclay:

set is used to set environment variables, and path is one kind of environment variable. Multiple paths are actually still just one variable value as far as set is concerned (that is, just a string containing semicolons). path is specifically for setting the search path, but neither of them checks whether the path is valid. Finally, the internal command set can completely replace the internal command path.

Usage of set: set variable_name=variable_value
set path=C:\windows;C:\windows\command
set temp=C:\temp

Usage of path: path path
path c:\windows;c:\windows\command
In addition, some people have proposed another so-called correct syntax: path=path; actually, this is just an odd usage caused by command.com's parameter parsing algorithm. It treats = ; and spaces all as valid parameter separators, so
command argv1 argv2
command;argv1;argv2
command=argv1=argv2
The above three usages are all legal and applicable in most cases for internal commands. In the occasional cases where they are not applicable, it is because command.com gives a special interpretation to = or ;, for example in path, ; is used to clear the contents of path.

Floor1　crazyclay	Posted 2003-10-16 00:00
初级用户　Posts 1　Credits 103
set PATH=f:\j2sdk1.4.2\bin;f:\windows;f:\windows\command set classpath=.;f:\j2sdk1.4.2\lib\tools.jar How should the two lines above be understood? Can path be set to any number of paths? Like in the first line above, where three paths are set.

Floor2　sunny1979	Posted 2003-10-16 00:00
初级用户　Posts 86　Credits 376
Yes, it can. These are executed separately, in order!

Floor3　willsort	Posted 2003-10-17 00:00
元老会员　Posts 1,512　Credits 4,432
Re crazyclay: set is used to set environment variables, and path is one kind of environment variable. Multiple paths are actually still just one variable value as far as set is concerned (that is, just a string containing semicolons). path is specifically for setting the search path, but neither of them checks whether the path is valid. Finally, the internal command set can completely replace the internal command path. Usage of set: set variable_name=variable_value set path=C:\windows;C:\windows\command set temp=C:\temp Usage of path: path path path c:\windows;c:\windows\command In addition, some people have proposed another so-called correct syntax: path=path; actually, this is just an odd usage caused by command.com's parameter parsing algorithm. It treats = ; and spaces all as valid parameter separators, so command argv1 argv2 command;argv1;argv2 command=argv1=argv2 The above three usages are all legal and applicable in most cases for internal commands. In the occasional cases where they are not applicable, it is because command.com gives a special interpretation to = or ;, for example in path, ; is used to clear the contents of path.