Batch files can be used to set environment variables, making them useful for configuring system settings, paths, and other variables dynamically.

Set a Temporary Environment Variable

A temporary environment variable is available only for the duration of the command prompt session. Once the terminal is closed, the variable is lost.

@echo off
set MY_VARIABLE=HelloWorld
echo %MY_VARIABLE%
pause

Set a Permanent Environment Variable

To set an environment variable permanently, use the setx command. This ensures the variable remains even after restarting the system.

@echo off
setx MY_VARIABLE "HelloWorld"
echo Environment variable set successfully.
pause

Set a System-Wide Environment Variable

To set an environment variable for all users, run the script as an administrator.

@echo off
setx MY_VARIABLE "HelloWorld" /M
echo System-wide variable set successfully.
pause

Delete an Environment Variable

To remove a temporary environment variable, use:

set MY_VARIABLE=

To remove a permanent environment variable, use:

REG delete "HKCUEnvironment" /F /V MY_VARIABLE

For system-wide removal, use:

REG delete "HKLMSYSTEMCurrentControlSetControlSession ManagerEnvironment" /F /V MY_VARIABLE

Final Thoughts

Using batch scripts to manage environment variables simplifies system configurations. Whether setting variables temporarily or permanently, this method helps automate system setup efficiently.