Set variable to null

[CenturionX]

Hello everybody,

Does somebody knows how to set a variable to null??

I put a set of variables at the beginning of my batch file like that
VAR1=
VAR2=
but i notices it causes the ERRORLEVEL be 1

How can i set a null value to these variables???

Thanks.

[Esra Sdrawkcab]

The Clue is in the Question

SET VAR1=

but there's no point as any nonexistent variable equates to null anyway.

[Matthias Tacke]

As you are posting from xp you might try:

for %%A in (VAR1 VAR2) do if defined %%A set "%%A="

HTH
Matthias

[billious]

"CenturionX" <darwinb...@gmail.com> wrote in message
news:1d136a89-3988-446f...@l33g2000pri.googlegroups.com...

Interesting observation - but not quite accurate.

set var=

will set ERRORLEVEL to 1 IF var undefined, but leave ERRORLEVEL unchanged if
var is defined
whereas set var=somethingelse will leave ERRORLEVEL unchanged regardless
(empirically determined)

if defined var set var=

would appear to stop the problem you appear to be encountering.

[CenturionX]

On Oct 9, 7:45 pm, "billious" <billious_1...@hotmail.com> wrote:
> "CenturionX" <darwinbaldr...@gmail.com> wrote in message

Thanks for the help.

[m406...@gmail.com]

SET VAR1=%

Using SET VAR1= will delete the variable completely. E.g. you would not be able to echo VAR1 as it doesn't exist.