How do you add a variable to a string in a batch file?

Question

I can't seem to find how to do this simple task, and this is probably answered.

How does one add a string to a variable? such as set "FileNameAndPCName = Locker\ and add %COMPUTERNAME%" to the variable so it would become like, "Locker/Bill"?

Code:

@echo off
set FileNameAndPCName="Locker\" + "%COMPUTERNAME%"
echo %FileNameAndPCName%
pause

remove spaces around =. They're significant in the set command — phuclv
– phuclv, Commented May 19, 2019 at 4:21
Sadly its not (I think), if I share you the entire code are you able to see what the problem is? — A random Guy
– A random Guy, Commented May 19, 2019 at 4:53
of course no one can help you if you don't show a minimal reproducible example — phuclv
– phuclv, Commented May 19, 2019 at 5:00
no. questions should be self-contained. No one will click on an external link just to read the code — phuclv
– phuclv, Commented May 19, 2019 at 5:28

phuclv · Accepted Answer · 2019-05-19 05:46:55Z

1

Operations in batch is already string manipulation, therefore you don't need and can't use + to concatenate strings. Just type the whole string like this

set "FileNameAndPCName=Locker\%COMPUTERNAME%"

set FileNameAndPCName="Locker\" + "%COMPUTERNAME%" will set the variable %FileNameAndPCName% to "Locker\" + "%COMPUTERNAME%" literally (after substituting %COMPUTERNAME%. Quotes are not special in the set command. And it's also recommended to use the set "var=value" variant instead of set var=value to avoid unexpected trailing spaces at the end

answered May 19, 2019 at 5:46

phuclv

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