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DOS批处理 & 脚本技术（批处理室） » [Question] About variable localization!

Floor1　myth126	Posted 2007-04-14 09:14
初级用户　Posts 16　Credits 47
I’ve never really understood what variable localization is! Yet in some friends’ works I often see it appear. I also couldn’t find any materials about it on the forum, so I’d like to ask all the experts: what does variable localization mean, and what is it used for? Is it like the difference between local variables and global variables in high-level languages? [ Last edited by myth126 on 2007-4-13 at 08:40 PM ]

Floor2　lxmxn	Posted 2007-04-14 13:34
版主　Posts 4,938　Credits 11,386
It can be understood as a local variable. When the batch file finishes running, the variable is gone too, and the memory space allocated for it is also released; this is different from system variables (which can be understood as global variables).

Floor3　myth126	Posted 2007-04-16 07:35
初级用户　Posts 16　Credits 47
Thanks for your reply! It’s still not very clear! ^_^ Then are variables that aren’t localized just system variables? Feels a bit confusing! ^_^

Floor4　lxmxn	Posted 2007-04-16 11:34
版主　Posts 4,938　Credits 11,386
Variables set in a batch script are generally local, while system variables can be used directly without needing to be set.