batch file - loop to append strings to variable

Question

How come this keep replacing the variable with each data from the loop instead of appending it?

set ipList=
for /F %%i in (ips.txt) do ( set ipList=%ipLis%,%%i )

Migtor · Accepted Answer · 2014-09-02 11:09:17Z

10

It's true you need delayed expansion. Another way:

setlocal ENABLEDELAYEDEXPANSION
set ipList=
for /F %%i in (ips.txt) do ( set ipList=!ipList!,%%i )

Note the '!' instead of '%%'. Also, there was a typo in your question, I suppose it should be %%ipList%% instead of %%ipLis%% (a 't' is lacking).

answered Sep 2, 2014 at 11:09

Migtor

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Comments

foxidrive · Accepted Answer · 2014-09-02 11:03:27Z

3

You need delayedexpansion or this technique:

set ipList=
for /F "delims=" %%i in (ips.txt) do call set "ipList=%%ipList%%,%%i"

answered Sep 2, 2014 at 11:03

foxidrive

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