variable in cycle

[JustAlex]

hello!
i have the next code:

Code: Select all

FOR /f "tokens=1 usebackq delims=," %%a in (`dsquery computer "OU=Users PC,OU=Computers,OU=Office,DC=gpi,DC=domain,DC=com"`) do (
rem set /a zzz=%zzz%+1
set zzz=%%a
   echo %zzz%
   echo %%a 

)
pause

when it's running, i get the right value of %%a for all steps in cycle,
but %zzz% is always empty...

what's wrong?
have i to set zzz as global variable? how?
or the syntax for set zzz=%%a is incorrect?

[jeb]

Hi,

zzz is not empty, but the way you try to print it fails.

The reason is the expansion phase of the %zzz%.
The %zzz% is only once expanded, at the beginning of the block ().
So you only see the value before you entered the block.

If you want to use the current value use the delayed expansion syntax.

Code: Select all

set EnableDelayedExpansion 
set zzz=Before
FOR /f "tokens=1 usebackq delims=," %%a in (`dsquery computer "OU=Users PC,OU=Computers,OU=Office,DC=gpi,DC=domain,DC=com"`) do (
rem set /a zzz=!zzz!+1
set zzz=%%a
   echo current=!zzz!, and %zzz%
   echo %%a
)
pause

jeb

[aGerman]

@jeb
First line:
setlocal EnableDelayedExpansion


Regards
aGerman

[jeb]

You got me.

You can see, I haven't tested it.

jeb