Set a Value in a for loop
I'm trying to search for a file on Window Path. So I've created a loop and for each directory I look for my File. If Found I Raise a flag.
My file sofar:
@Echo OFF
SET path=%PATH%;C:Program Files7-Zip;C:Program Files (x86)Microsoft Visual Studio2017EnterpriseMSBuild15.0Bin
SET /A var=0
for %%G in ("%path:;=" "%") do IF EXIST 7x.exe (SET /A var = 1 )
IF /I "%var%" EQU "1" ECHO equality with 1
IF /I "%var%" EQU "0" ECHO equality with 0
But my variable are 0 after my loop even though I know for sure the file is there.
So this raises some questions:
1) How do I set my variable var inside the loop
2) Can I test for the value of var before checking for the existance of a file
Pseudo code: If (var == 0 && EXIST 7x.exe) set var = 1
batch-file
asked Nov 23 '18 at 12:41
Jens BorrisholtJens Borrisholt
4,33911944
|
show 7 more comments
I'm trying to search for a file on Window Path. So I've created a loop and for each directory I look for my File. If Found I Raise a flag.
My file sofar:
@Echo OFF
SET path=%PATH%;C:Program Files7-Zip;C:Program Files (x86)Microsoft Visual Studio2017EnterpriseMSBuild15.0Bin
SET /A var=0
for %%G in ("%path:;=" "%") do IF EXIST 7x.exe (SET /A var = 1 )
IF /I "%var%" EQU "1" ECHO equality with 1
IF /I "%var%" EQU "0" ECHO equality with 0
But my variable are 0 after my loop even though I know for sure the file is there.
So this raises some questions:
1) How do I set my variable var inside the loop
2) Can I test for the value of var before checking for the existance of a file
Pseudo code: If (var == 0 && EXIST 7x.exe) set var = 1
batch-file
asked Nov 23 '18 at 12:41
Jens BorrisholtJens Borrisholt
4,33911944
So you want to check if 7z.exe is present in your path? Why don't you simply try to run it?
– Dominique
Nov 23 '18 at 12:44
Because i want to display an error message if it doesn't
– Jens Borrisholt
Nov 23 '18 at 12:47
why not just dowhere 7zip.exe & echo %errorlevel%
– Gerhard Barnard
Nov 23 '18 at 12:50
4
You forgot to include the%%GFOR parameter in the file name:for %%G in ("%path:;=" "%") do IF EXIST "%%~G7x.exe" (SET /A var = 1 )
– Aacini
Nov 23 '18 at 13:05
1
(by the way: it's7z.exe, not7x.exe)
– Stephan
Nov 23 '18 at 13:19
|
show 7 more comments
I'm trying to search for a file on Window Path. So I've created a loop and for each directory I look for my File. If Found I Raise a flag.
My file sofar:
@Echo OFF
SET path=%PATH%;C:Program Files7-Zip;C:Program Files (x86)Microsoft Visual Studio2017EnterpriseMSBuild15.0Bin
SET /A var=0
for %%G in ("%path:;=" "%") do IF EXIST 7x.exe (SET /A var = 1 )
IF /I "%var%" EQU "1" ECHO equality with 1
IF /I "%var%" EQU "0" ECHO equality with 0
But my variable are 0 after my loop even though I know for sure the file is there.
So this raises some questions:
1) How do I set my variable var inside the loop
2) Can I test for the value of var before checking for the existance of a file
Pseudo code: If (var == 0 && EXIST 7x.exe) set var = 1
batch-file
asked Nov 23 '18 at 12:41
Jens BorrisholtJens Borrisholt
4,33911944
I'm trying to search for a file on Window Path. So I've created a loop and for each directory I look for my File. If Found I Raise a flag.
My file sofar:
@Echo OFF
SET path=%PATH%;C:Program Files7-Zip;C:Program Files (x86)Microsoft Visual Studio2017EnterpriseMSBuild15.0Bin
SET /A var=0
for %%G in ("%path:;=" "%") do IF EXIST 7x.exe (SET /A var = 1 )
IF /I "%var%" EQU "1" ECHO equality with 1
IF /I "%var%" EQU "0" ECHO equality with 0
But my variable are 0 after my loop even though I know for sure the file is there.
So this raises some questions:
1) How do I set my variable var inside the loop
2) Can I test for the value of var before checking for the existance of a file
Pseudo code: If (var == 0 && EXIST 7x.exe) set var = 1
batch-file
batch-file
asked Nov 23 '18 at 12:41
Jens BorrisholtJens Borrisholt
4,33911944
asked Nov 23 '18 at 12:41
Jens BorrisholtJens Borrisholt
4,33911944
asked Nov 23 '18 at 12:41
Jens BorrisholtJens Borrisholt
4,33911944
asked Nov 23 '18 at 12:41
Jens BorrisholtJens Borrisholt
4,33911944
asked Nov 23 '18 at 12:41
Jens BorrisholtJens Borrisholt
4,33911944
4,33911944
So you want to check if 7z.exe is present in your path? Why don't you simply try to run it?
– Dominique
Nov 23 '18 at 12:44
Because i want to display an error message if it doesn't
– Jens Borrisholt
Nov 23 '18 at 12:47
why not just dowhere 7zip.exe & echo %errorlevel%
– Gerhard Barnard
Nov 23 '18 at 12:50
4
You forgot to include the%%GFOR parameter in the file name:for %%G in ("%path:;=" "%") do IF EXIST "%%~G7x.exe" (SET /A var = 1 )
– Aacini
Nov 23 '18 at 13:05
1
(by the way: it's7z.exe, not7x.exe)
– Stephan
Nov 23 '18 at 13:19
|
show 7 more comments
So you want to check if 7z.exe is present in your path? Why don't you simply try to run it?
– Dominique
Nov 23 '18 at 12:44
Because i want to display an error message if it doesn't
– Jens Borrisholt
Nov 23 '18 at 12:47
why not just dowhere 7zip.exe & echo %errorlevel%
– Gerhard Barnard
Nov 23 '18 at 12:50
4
You forgot to include the%%GFOR parameter in the file name:for %%G in ("%path:;=" "%") do IF EXIST "%%~G7x.exe" (SET /A var = 1 )
– Aacini
Nov 23 '18 at 13:05
1
(by the way: it's7z.exe, not7x.exe)
– Stephan
Nov 23 '18 at 13:19
So you want to check if 7z.exe is present in your path? Why don't you simply try to run it?
– Dominique
Nov 23 '18 at 12:44
So you want to check if 7z.exe is present in your path? Why don't you simply try to run it?
– Dominique
Nov 23 '18 at 12:44
Because i want to display an error message if it doesn't
– Jens Borrisholt
Nov 23 '18 at 12:47
Because i want to display an error message if it doesn't
– Jens Borrisholt
Nov 23 '18 at 12:47
why not just do
where 7zip.exe & echo %errorlevel%– Gerhard Barnard
Nov 23 '18 at 12:50
why not just do
where 7zip.exe & echo %errorlevel%– Gerhard Barnard
Nov 23 '18 at 12:50
4
4
You forgot to include the
%%G FOR parameter in the file name: for %%G in ("%path:;=" "%") do IF EXIST "%%~G7x.exe" (SET /A var = 1 )– Aacini
Nov 23 '18 at 13:05
You forgot to include the
%%G FOR parameter in the file name: for %%G in ("%path:;=" "%") do IF EXIST "%%~G7x.exe" (SET /A var = 1 )– Aacini
Nov 23 '18 at 13:05
1
1
(by the way: it's
7z.exe, not 7x.exe)– Stephan
Nov 23 '18 at 13:19
(by the way: it's
7z.exe, not 7x.exe)– Stephan
Nov 23 '18 at 13:19
|
show 7 more comments
1 Answer
1
active
oldest
votes
the where command (by default) searches a file through the path (it can also be used to search a folder tree or even the whole disk with the /R switch, which you obviously don't need here). It returns an errorlevel of 0 if the file was found and 1 if not found. There is even a /Q (Quiet) switch. So this makes it quite easy:
where /q 7z.exe
set var=%errorlevel%
echo equality with %var%
Instead of the set command, you can also directly echo equality with %errorlevel%, but keep in mind, using (nearly) any command between where and the use of %errorlevel% might change the errorlevel.
answered Nov 23 '18 at 13:02
StephanStephan
35.5k43256
Thx I'll Try it out. If you have the time then for educational purposes. Can you create a solution "my! way
– Jens Borrisholt
Nov 23 '18 at 13:03
@Stephan I think you should put anifhere which would checkerrorlevelvariable. For example:if "%errorlevel%" EQU "0" do something.
– double-beep
Nov 23 '18 at 13:06
I dont understand your solution %var% allways equals tio 1 nomatter what I'm searching for
– Jens Borrisholt
Nov 23 '18 at 13:06
@double-beep: OP does obviously know, how to build anifstatement - his question was how to check, if the file exists
– Stephan
Nov 23 '18 at 13:13
@Stephan your solution doesn't work
– Jens Borrisholt
Nov 23 '18 at 13:15
|
show 4 more comments
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the where command (by default) searches a file through the path (it can also be used to search a folder tree or even the whole disk with the /R switch, which you obviously don't need here). It returns an errorlevel of 0 if the file was found and 1 if not found. There is even a /Q (Quiet) switch. So this makes it quite easy:
where /q 7z.exe
set var=%errorlevel%
echo equality with %var%
Instead of the set command, you can also directly echo equality with %errorlevel%, but keep in mind, using (nearly) any command between where and the use of %errorlevel% might change the errorlevel.
answered Nov 23 '18 at 13:02
StephanStephan
35.5k43256
Thx I'll Try it out. If you have the time then for educational purposes. Can you create a solution "my! way
– Jens Borrisholt
Nov 23 '18 at 13:03
@Stephan I think you should put anifhere which would checkerrorlevelvariable. For example:if "%errorlevel%" EQU "0" do something.
– double-beep
Nov 23 '18 at 13:06
I dont understand your solution %var% allways equals tio 1 nomatter what I'm searching for
– Jens Borrisholt
Nov 23 '18 at 13:06
@double-beep: OP does obviously know, how to build anifstatement - his question was how to check, if the file exists
– Stephan
Nov 23 '18 at 13:13
@Stephan your solution doesn't work
– Jens Borrisholt
Nov 23 '18 at 13:15
|
show 4 more comments
the where command (by default) searches a file through the path (it can also be used to search a folder tree or even the whole disk with the /R switch, which you obviously don't need here). It returns an errorlevel of 0 if the file was found and 1 if not found. There is even a /Q (Quiet) switch. So this makes it quite easy:
where /q 7z.exe
set var=%errorlevel%
echo equality with %var%
Instead of the set command, you can also directly echo equality with %errorlevel%, but keep in mind, using (nearly) any command between where and the use of %errorlevel% might change the errorlevel.
answered Nov 23 '18 at 13:02
StephanStephan
35.5k43256
Thx I'll Try it out. If you have the time then for educational purposes. Can you create a solution "my! way
– Jens Borrisholt
Nov 23 '18 at 13:03
@Stephan I think you should put anifhere which would checkerrorlevelvariable. For example:if "%errorlevel%" EQU "0" do something.
– double-beep
Nov 23 '18 at 13:06
I dont understand your solution %var% allways equals tio 1 nomatter what I'm searching for
– Jens Borrisholt
Nov 23 '18 at 13:06
@double-beep: OP does obviously know, how to build anifstatement - his question was how to check, if the file exists
– Stephan
Nov 23 '18 at 13:13
@Stephan your solution doesn't work
– Jens Borrisholt
Nov 23 '18 at 13:15
|
show 4 more comments
the where command (by default) searches a file through the path (it can also be used to search a folder tree or even the whole disk with the /R switch, which you obviously don't need here). It returns an errorlevel of 0 if the file was found and 1 if not found. There is even a /Q (Quiet) switch. So this makes it quite easy:
where /q 7z.exe
set var=%errorlevel%
echo equality with %var%
Instead of the set command, you can also directly echo equality with %errorlevel%, but keep in mind, using (nearly) any command between where and the use of %errorlevel% might change the errorlevel.
answered Nov 23 '18 at 13:02
StephanStephan
35.5k43256
the where command (by default) searches a file through the path (it can also be used to search a folder tree or even the whole disk with the /R switch, which you obviously don't need here). It returns an errorlevel of 0 if the file was found and 1 if not found. There is even a /Q (Quiet) switch. So this makes it quite easy:
where /q 7z.exe
set var=%errorlevel%
echo equality with %var%
Instead of the set command, you can also directly echo equality with %errorlevel%, but keep in mind, using (nearly) any command between where and the use of %errorlevel% might change the errorlevel.
answered Nov 23 '18 at 13:02
StephanStephan
35.5k43256
edited Nov 23 '18 at 13:15
answered Nov 23 '18 at 13:02
StephanStephan
35.5k43256
answered Nov 23 '18 at 13:02
StephanStephan
35.5k43256
answered Nov 23 '18 at 13:02
StephanStephan
35.5k43256
35.5k43256
Thx I'll Try it out. If you have the time then for educational purposes. Can you create a solution "my! way
– Jens Borrisholt
Nov 23 '18 at 13:03
@Stephan I think you should put anifhere which would checkerrorlevelvariable. For example:if "%errorlevel%" EQU "0" do something.
– double-beep
Nov 23 '18 at 13:06
I dont understand your solution %var% allways equals tio 1 nomatter what I'm searching for
– Jens Borrisholt
Nov 23 '18 at 13:06
@double-beep: OP does obviously know, how to build anifstatement - his question was how to check, if the file exists
– Stephan
Nov 23 '18 at 13:13
@Stephan your solution doesn't work
– Jens Borrisholt
Nov 23 '18 at 13:15
|
show 4 more comments
Thx I'll Try it out. If you have the time then for educational purposes. Can you create a solution "my! way
– Jens Borrisholt
Nov 23 '18 at 13:03
@Stephan I think you should put anifhere which would checkerrorlevelvariable. For example:if "%errorlevel%" EQU "0" do something.
– double-beep
Nov 23 '18 at 13:06
I dont understand your solution %var% allways equals tio 1 nomatter what I'm searching for
– Jens Borrisholt
Nov 23 '18 at 13:06
@double-beep: OP does obviously know, how to build anifstatement - his question was how to check, if the file exists
– Stephan
Nov 23 '18 at 13:13
@Stephan your solution doesn't work
– Jens Borrisholt
Nov 23 '18 at 13:15
Thx I'll Try it out. If you have the time then for educational purposes. Can you create a solution "my! way
– Jens Borrisholt
Nov 23 '18 at 13:03
Thx I'll Try it out. If you have the time then for educational purposes. Can you create a solution "my! way
– Jens Borrisholt
Nov 23 '18 at 13:03
@Stephan I think you should put an
if here which would check errorlevel variable. For example: if "%errorlevel%" EQU "0" do something.– double-beep
Nov 23 '18 at 13:06
@Stephan I think you should put an
if here which would check errorlevel variable. For example: if "%errorlevel%" EQU "0" do something.– double-beep
Nov 23 '18 at 13:06
I dont understand your solution %var% allways equals tio 1 nomatter what I'm searching for
– Jens Borrisholt
Nov 23 '18 at 13:06
I dont understand your solution %var% allways equals tio 1 nomatter what I'm searching for
– Jens Borrisholt
Nov 23 '18 at 13:06
@double-beep: OP does obviously know, how to build an
if statement - his question was how to check, if the file exists– Stephan
Nov 23 '18 at 13:13
@double-beep: OP does obviously know, how to build an
if statement - his question was how to check, if the file exists– Stephan
Nov 23 '18 at 13:13
@Stephan your solution doesn't work
– Jens Borrisholt
Nov 23 '18 at 13:15
@Stephan your solution doesn't work
– Jens Borrisholt
Nov 23 '18 at 13:15
|
show 4 more comments
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So you want to check if 7z.exe is present in your path? Why don't you simply try to run it?
– Dominique
Nov 23 '18 at 12:44
Because i want to display an error message if it doesn't
– Jens Borrisholt
Nov 23 '18 at 12:47
why not just do
where 7zip.exe & echo %errorlevel%– Gerhard Barnard
Nov 23 '18 at 12:50
4
You forgot to include the
%%GFOR parameter in the file name:for %%G in ("%path:;=" "%") do IF EXIST "%%~G7x.exe" (SET /A var = 1 )– Aacini
Nov 23 '18 at 13:05
1
(by the way: it's
7z.exe, not7x.exe)– Stephan
Nov 23 '18 at 13:19