How to join strings within for loop in windows bat file

Asked Apr 12 '22 at 08:52

Active Apr 12 '22 at 09:07

Viewed 13 times

I want to concat each a.txt in C:, D:, and E:.

@echo off
setlocal EnableDelayedExpansion

set list=C:
set list=%list%;D:
set list=%list%;E:

set "file_list="

for %%f in (%list%) do (
    set "file_list=%file_list% %%f\a.txt"
)

echo "file_list=%file_list%"

I expect the output is file_list=C:\a.txt D:\a.txt E:\a.txt,

but the actual output is file_list= E:\a.txt

edited Apr 12 '22 at 09:07

asked Apr 12 '22 at 08:52

user1633272

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The refered topic doesnot answer my question! – user1633272 Apr 12 '22 at 14:19
As I read that duplicate, you need to use `!list!` instead of `%list%`, have you tried that? – Mark Rotteveel Apr 15 '22 at 10:59
@MarkRotteveel After changing `%file_list%` to `!file_list`, it works. I was thinking only variables defined inside the `for` block needs to be change to `!var!`. This topic could be closed, no problems. – user1633272 Apr 15 '22 at 11:05

How to join strings within for loop in windows bat file

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