Setlocal Command in Windows: Tips and Examples

The setlocal command helps start the process of differentiating environment variables in a batch file. This process will continue until paired with the appropriate endlocal command or the batch file end.To better understand how to use this command, see the example below.

Setlocal command syntax

 setlocal [enableextensions | disableextensions] [enabledelayedexpansion | disabledelayedexpansion] 

Setlocal command argument

Argument

Describe

enableextensions

Activate the command extensions until connected to the appropriate endlocal command, regardless of the settings that were applied before the setlocal command was run.

disableextensions

Turn off the command extensions until you connect to the appropriate endlocal command, regardless of the settings that were applied before the setlocal command was run.

enabledelayedexpansion

Allow to extend the delayed environment variable until it is connected to the appropriate endlocal command, regardless of the settings that were applied before the setlocal command was run.

disabledelayedexpansion

Disable the extension of the delayed environment variable until it connects to the appropriate endlocal command, regardless of the settings that were applied before the setlocal command was run.

/?

Show help at thecommand prompt.

Comment setlocal command

Use the setlocal command

• When you use the setlocal command outside the script or batch file, it will be completely invalid.

Change environment variables

• Use the setlocal command to change environment variables when you run a batch file. The environmental changes that will be made after you run the setlocal command are local changes to the batch file. The Cmd.exe program will restore previous settings when it is paired with the appropriate endlocal command or the batch file end.

Nested commands

• You can use the integration of multiple setlocal or endlocal commands in a batch program (ie nested commands).

Check command extensions in batch files

• The setlocal command will set the ERRORLEVEL variable.disabledelayedexpansion}, variable ERRORLEVEL will be set to 0 (zero).Otherwise, it will be set to 1. You can use this information in batch scripts to determine if extensions are available, as in the example below:

 setlocal enableextensions 
 verify other 2> nul 
 if errorlevel 1 echo Unable to enable extensions 

• Because cmd does not set the ERRORLEVEL variable when the command extension is disabled, the verify command will initialize ERRORLEVEL to a value other than 0 when you use it with an invalid argument.disabledelayedexpansion} and it does not set the ERRORLEVEL variable to 1, the command extensions will not be available.

The setlocal command example

You can differentiate environment variables in a batch file, as shown in the following sample script:

 rem ******* Begin Comment ************** 
 rem ch??ng trình này b?t ??u các ch??ng trình superapp ch??ng trình trên m?ng, 
 ?ang ghi l?i các k?t qu? vào m?t t?p tin, và hi?n th? t?p tin 
 rem in Notepad. 
 rem ******* End Comment ************** 
 @echo off 
 setlocal 
 path = g: programssuperapp;% path% 
 superapp call> c: superapp.out 
 endlocal 
 start notepad c: superapp.out 

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