bat variable string
Any extra spaces around either the variable name or the string, will not be ignored, SET is not forgiving of extra spaces like many other scripting languages. , Syntax: SET [ variable=[string]] Example: set 顯示目前環境變數 set P 列出所有以'P'開頭的環境變數 set USER=Tom 將USER加入環境變數中,Batch Script Variables - Learn Batch Script starting from Overview, Environment, Commands, Files, Syntax, Variables, Comments, Strings, Arrays, Decision ... , DOS does not require declaration of variables. The value of undeclared/uninitialized variables is an empty string, or "" . Most people like this, ..., To set a variable, use the set command. Also to concatenate, you don't have (read: must not) use something like concatenation symbols:, I need to do a .bat for DOS that do the following: ... lot :) btw imagine i want now to open a txt file and put: set ROOT = string I catch from the file?, In general, use quotes on variable asignation to ensure the spaces are correctly handled, but don't include the quotes inside the values. So, all ..., The general idea is this: SET filename=c:-path-to-file.txt COPY "%filename%" c:-destination. Note the quotes around %filename% : they are ..., The concatenation works! But your echo fails. As you are in a command block (parenthesis) all percent variables are expanded before the block ..., So the variable you've created can be referenced with %location % . If that's not what you want, remove the extra space(s) in the definition.
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 bat variable string 相關參考資料
Set - Environment Variable - Windows CMD - SS64.com
Any extra spaces around either the variable name or the string, will not be ignored, SET is not forgiving of extra spaces like many other scripting languages. https://ss64.com 淺談Batch File Command @ WT's Blog :: 痞客邦::
Syntax: SET [ variable=[string]] Example: set 顯示目前環境變數 set P 列出所有以'P'開頭的環境變數 set USER=Tom 將USER加入環境變數中 http://wt.pixnet.net Batch Script Variables - Tutorialspoint
Batch Script Variables - Learn Batch Script starting from Overview, Environment, Commands, Files, Syntax, Variables, Comments, Strings, Arrays, Decision ... https://www.tutorialspoint.com Windows Batch Scripting: Variables - * steve jansen *
DOS does not require declaration of variables. The value of undeclared/uninitialized variables is an empty string, or "" . Most people like this, ... http://steve-jansen.github.io windows - Concatenating strings and variables in batch - Stack ...
To set a variable, use the set command. Also to concatenate, you don't have (read: must not) use something like concatenation symbols: https://stackoverflow.com batch file - concatenate variables - Stack Overflow
I need to do a .bat for DOS that do the following: ... lot :) btw imagine i want now to open a txt file and put: set ROOT = string I catch from the file? https://stackoverflow.com Batch Script - Variable Strings With Spaces - Stack Overflow
In general, use quotes on variable asignation to ensure the spaces are correctly handled, but don't include the quotes inside the values. So, all ... https://stackoverflow.com How to create a String variable and use batch - Stack Overflow
The general idea is this: SET filename=c:-path-to-file.txt COPY "%filename%" c:-destination. Note the quotes around %filename% : they are ... https://stackoverflow.com How to concatenate variable with string or variable in batch file ...
The concatenation works! But your echo fails. As you are in a command block (parenthesis) all percent variables are expanded before the block ... https://stackoverflow.com Declaring and using a variable in Windows batch file (.BAT ...
So the variable you've created can be referenced with %location % . If that's not what you want, remove the extra space(s) in the definition. https://stackoverflow.com |