How to pass variables from one batch file to another batch file?

Question

How do I write a batch file which gets an input variable and sends it to another batch file to be processed.

Batch 1

I don\'t know how to se

Answer 1

You can pass in the batch1.bat variables as arguments to batch2.bat.

arg_batch1.bat

@echo off
cls

set file_var1=world
set file_var2=%computername%
call arg_batch2.bat %file_var1% %file_var2%

:: Note that after batch2.bat runs, the flow returns here, but since there's
:: nothing left to run, the code ends, giving the appearance of ending with
:: batch2.bat being the end of the code.

arg_batch2.bat

@echo off

:: There should really be error checking here to ensure a
:: valid string is passed, but this is just an example.
set arg1=%~1
set arg2=%~2

echo Hello, %arg1%! My name is %arg2%.

---

If you need to run the scripts simultaneously, you can use a temporary file.

file_batch1.bat

@echo off
set var=world

:: Store the variable name and value in the form var=value
:: > will overwrite any existing data in args.txt, use >> to add to the end
echo var1=world>args.txt
echo var2=%COMPUTERNAME%>>args.txt

call file_batch2.bat

file_batch2.bat

@echo off
cls

:: Get the variable value from args.txt
:: Again, there is ideally some error checking here, but this is an example
:: Set no delimiters so that the entire line is processed at once
for /f "delims=" %%A in (args.txt) do (
    set %%A
)

echo Hello, %var1%! My name is %var2%.