Batch for loop variable. 001 -vframes 1 -an "%%~nv.

Batch for loop variable Writing a For Loop in Batch Scripting. On this page I'll try to explain how a FOR loop is interpreted, why it seems unable to SET variables, and how to SET variables in FOR loops anyway. : echo %entry1% echo %entry2% Example: Sep 22, 2012 · Anyway, on to your answer: @echo off SETLOCAL ENABLEDELAYEDEXPANSION set dir1=%1 echo recieved !dir1! for /R %dir1% %%a in (*. ) How to increment for loop variable in batch script? 0. FOR /F - Loop through the output of a command. txt ^| FINDSTR /B /I "Total Pages"') do ( SET myvar=!myvar! Dec 5, 2016 · I have a batch-script with multiple arguments. This FOR loop has different versions. bat "This is example number 2" Aug 27, 2013 · For posterity: I just wanted to propose a slight modification on @dss otherwise great answer. Oct 5, 2023 · To avoid confusion with the batch parameters, %0 through %9, you can use any character for variable except the numerals 0 through 9. So the text file might have: RELEASE1 RELEASE2 RELEASE3 The batch file sets each line in the Mar 4, 2015 · Windows batch file - Variables in nested FOR loops. You can use multiple values for variable in complex batch files to distinguish different replaceable variables. Nov 28, 2014 · The output of the below wmic logicaldisk get providername /value using cmd (with limited user rights) on the computer I'm using is: ProviderName= ProviderName= ProviderName=\\xxx-SN-NA01\User Dec 21, 2011 · The reason the original code does not work is because the directory for the FOR /R option must be known at the time the FOR is parsed, but the %%i variable is not expanded until after the FOR statement has already been parsed. invoked, of course, with: Oct 14, 2020 · hi I'm new to batch scripting when is use address of the of inside the for loop there is no problem but when is store that address in a variable and use that variable in a for /f loop for loop read the text of the variable not the file content FOR - Loop commands. This gives the program time to reset the data it uses, thanks to the call command which serves as a way to update the May 28, 2015 · Is there a secret variable that tells me the current loop-index? -- just like Autohotkey's A_Index variable. Call variable in for loop - BATCH. 001 -vframes 1 -an "%%~nv. txt Apr 5, 2012 · Batch File FOR loop using variable. \*) do @echo %sfiles in current and all subdirs: for %x is the loops variable and will be (starting value, increment of value, Method 2: Loop in Batch. The code: @echo off SETLOCAL ENABLEDELAYEDEXPANSION ENABLEEXTENSIONS May 26, 2010 · Variable expansion is usually done when a statement is first read. Aug 3, 2016 · Is this level of complexity possible in Windows batch files? If so, how can I put an If condition inside a for loop to read a text file? Thanks for your attention. files in current dir: for %f in (. Only the second one (tokens=2) will be passed (as variable %%a) to the for loop. The reason this is so is because the nested for-loop only runs once per iteration of the overall for loop. Oct 26, 2022 · First I find out how many lines are in a text file, and set that to the variable numChapters. FOR /R - Loop through files (recurse subfolders) . I tried the following code, but results is not expected. cmd file as above): MainFile. The value in group appears to be terminated by an extra NULL, so the :loptrail routine first arbitrarily removes that last character, then any remaining trailing spaces. Again, this is because the %LIST% is expanded just once when the FOR statement is read, and at that time the LIST variable is empty. I will be passing an argument into the batch file like this: C:\execbatch. This means that %Count% will always expand to 0 in each iteration of the loop, no matter what we do to it with the set command: variable in a for loop inside a batch. Hot Network Questions Practicality of weaponizing civilian container ships Oct 1, 2008 · Although care should be taken. txt" SET /P start_position= Please enter the start position: SET /P For a reason that i'm ignoring, the FOR command won't work for looping a specific label. FOR /L - Loop through a range of numbers. You are declaring a variable with a space in the name. @echo on SETLOCAL EnableDelayedExpansion SET myvar= for /f "tokens=1-3" %%P in ('type c:\shafique\sfsview_monitor1. I want to remove May 5, 2017 · I need to get a usable variable by adding leading zeros to the loop index variable (%%i) below. 2. Equivalent PowerShell: ForEach-Object - Loop for each object in Jun 10, 2017 · So the value of %x% would be the value as it existed before the loop is executed. FOR - Loop through a set of files in one folder or a list of folders. It doesn't explain how to correctly nest for-loops (i. cmd file. Nested Loop in . FOR /F - Loop through items in a text file. Cmd has a built-in FOR variable modifier ~x - if %%A in a batch script (or %A in a command line) is a filename then %%~nA is the name and %%~xA is the extension, which is what you see if you read backwards from the end of the whole filename + extension string, and stop at the first dot. To use the FOR command in a batch program, specify %%variable instead of %variable. I have a simple DOS batch file that loops through all files in a directory and renames them. cmd to parse the output of the LOOP. FORFILES - Batch process multiple files. txt File2. Each iteration of the loop, the statements get executes. – Apr 29, 2016 · for %%v in (*. jpg" From "help for": %~I - expands %I removing any surrounding quotes (") %~fI - expands %I to a fully qualified path name %~dI - expands %I to a drive letter only %~pI - expands %I to a path only %~nI - expands %I to a file name only %~xI - expands %I to a file extension only %~sI - expanded path contains When Command Extensions are enabled (Windows XP and newer, roughly), you can use the syntax %~nF (where F is the variable and ~n is the request for its name) to only get the filename. When looping in for loop each iteration is accessed as the %%A variable. May 14, 2021 · Don't use tokens with a dot delimiter if you don't know how many dots there might be. : set entry%c% = 'somestring' and afterwards use these numbered variables to print output outside for loop e. Dec 13, 2011 · This will parse the string into variables accessable outside of the loop (; setlocal enabledelayedexpansion set your_string="whatever:you:want" for /f "tokens=1,2,3 delims=:" %%a in ('echo !your_string!') do ( set first_sub_string=%%a set second_sub_string=%%b set third_sub_string=%%c ) echo Congrats. This is my code. Mar 3, 2015 · In batch files, each line or block of lines (code inside parenthesis) is parsed, executed and the process repeated for the next line/block. flv) do ( echo %%f ) pause In the for-loop all files with the extension flv get echoed Sep 5, 2016 · I have created a code that takes the following variables: SET sdir=T:\path\to\in\ SET tempdir=T:\path\to\tempBatch\ SET list=DE NL Then, I try to loop through the list items and copy all TXT file Sep 26, 2008 · Iterate through. Sep 6, 2010 · I have a variable assignment problem inside the DOS script for loop. Aug 31, 2009 · %variable Specifies a single letter replaceable parameter. For simple batch files, a single character such as %%f will work. Apr 29, 2014 · It's like the "a" variable isn't retained over the second line. nested for loops with variable used in the nested loop windows batch. If you want to use count after the endlocal, you have to use a "trick" made possible by the very problem you're having: The value of %myvar% inside the for loop will always be the value it was before the loop began. So your script would end up looking something like this: Nov 10, 2017 · How to set a variable inside a variable in a for loop? When I execute this code the var[] is empty. This is how the script looks: @echo off title MyTitle set cycles=0 :startpoint echo %cycles% (my command) goto startpoint I would like to be able to see the variable "cycles" increment by 1 each time it goes back to :startpoint, how do i do that? Jul 12, 2017 · the loop works but each variable contains the last occurence of the loop, which is XXX2. If you are outside of the code block, you can go back to using %. txt). Then you use ! instead of % to expand the variable. May 26, 2021 · (note: I pass flags to the batch rather than use user input in the batch. *) do echo %~nF Apr 6, 2017 · FOR command in cmd has a tedious learning curve, notably because how variables react within ()'s statements you can assign any variables, but you can't read then back within the ()'s, unless you use the "setlocal ENABLEDELAYEDEXPANSION" statement, and therefore also use the variables with !!'s instead of %%'s (!_var!) Dec 31, 2013 · You need delayed expansion to use a variable inside a block when this variable has been set (or changed) inside the same block. pdf) DO ( :: Adding a colon to the end of the filename allows the extension to be ID'd : without explicitly looking at it with an IF statement, while simultaneously :: avoiding similar looking character groupings inside the filename. exe -i "%%v" -y -f mjpeg -ss 0. I want to nest for-loops with a different use-case in which this workaround doesn't solve the problem and came here via google search for "batch nested for loop". ttf') DO ( set /a fName=%%~na echo %fName% ) When I echo fName variable I get only last filename repeatedly number of times for for loop count. The code in the for loop is point out the various ways to set a variable. How to get output of a FOR loop into a variable in a batch file. e. To use some value inside a function, which is some file, eXtention, folder, variable, etc. Here is what I have: @ECHO off DEL ". Below is an example of a simple for loop I would like to use to display all the different version files (from my list) Jul 9, 2010 · I have the following batch script from Wikipedia: @echo off for /R "C:\Users\Admin\Ordner" %%f in (*. Wildcards may be used. @echo off & setlocal enabledelayedexpansion :loop set /P txt_file=<Collector. @echo off set loopcount=5 :loop echo Hello World! Jan 10, 2016 · After a bit of searching I found a mention of using delayed expansion of variables (setlocal EnableDelayedExpansion), but that causes a problem, because the directory path the user inputs may contain exclamation marks, which get removed if I do that (and so the for loop is not executed at all). The loop will only run once since you are dealing with a single string in this case. FOR /R C:\Directory %F in (*. Sep 3, 2013 · I have a batch file that contains the code below which assigns a variable for each line in a text file. bat file. It is necessary to pass this item to him, he will not access the already defined variables if you don't to pass something that it is to be used within the function: Batch file for loop – looping through files. @echo off for /L %%i in (1, 1, 5) do ( echo %%i rem How to create a variable j here as a rem result of adding leading zeros to %%i? set var=%1 echo var set command="" IF var==true ( set command=dir ) IF var==false ( set command=dir /a ) echo %command% %command% So, if I run this script by typing in C:\\&gt;test true FOR /R - Loop through files (recurse subfolders). In a Batch File: How to echo each Jun 27, 2011 · Basically, the reason your script doesn't work as intended is because the variables in the loop body are parsed and evaluated before the loop executes. bat with a variable range and multiline commands. Issue with *For loop* and *delayed expansion* 1. Sum in batch script. BAT N EXT New_name " where N/%1 is the number want it to start the numbering at, EXT/%2 is the extension i want to target, eg jpg or png, and New_name/%3 is the new name to assign. Jul 11, 2013 · Setting an environment variable to a for loop %%i variable (batch scripting) 1 Issue with setting environment variable through bat file to execute a java program Aug 23, 2021 · Batch for loop not recognizing its own variable. bat "This is example one" or C:\execbatch. FOR /D - Loop through several folders. 1. (set) Specifies a set of one or more files. set var=value. ECHO. Just numbering or lettering them could make it hard to read your script later. ————————— Delayed variable expansion is often useful when working with FOR Loops, normally an entire FOR loop is evaluated as a single command even if it spans multiple lines of a batch script. In my example, we are just removing the extension from the filename. Inside the for loop, there are two further loops. On computer which I want run my script there's no "forf Jan 31, 2013 · This seems like is should be fairly simple, but I am having trouble getting a FOR loop in DOS to correctly report the current item it is evaluating. For loop with multi-line body. If a variable changes its value inside the line/block, this changed But it somehow doesn't work in for loop. FOR /L %%parameter IN (start,step,end) DO command This command is probably the one I need, but the "end" value is stored in a variable. txt File3. Below the sample code @echo off set ans=%1 SET STRING=%ans:"=% echo Parsing the. command-parameters Specifies parameters or switches for the specified command. The solution then would be calling **cd /d %~dp0** before the for loop. /positions. Sep 2, 2014 · How come this keep replacing the variable with each data from the loop instead of appending it? Windows CMD Batch: concatenating variable NAME in a loop. When the body executes, the vars have already been evaluated and the same values are used in all iterations. The first reads a line, and the second reads the following line. See this little demonstration (I used a simple if construct instead of for, but the effect is the same (not with if or for, but with blocks (inside (and )). how do i get the actual value of the second loop? REM @echo off set fastestserver= Feb 9, 2017 · For this to work you need to enable and use delayed expansion, because the variable is modified and read within the same block of code, namely the loop body, so read it like !index!; using normal expansion like %index% returned the value present before the loop has even started: Nov 21, 2016 · Appending a new line character to a variable in a for loop Windows batch. Jun 16, 2014 · For example set c=0 before for loop and then set c = c+1 inside for loop and use this number to create dynamic variable name inside for loop e. So here is the syntax or perhaps an example of for loop for looping through files in particular location. If you want to use the modified variable, use !myvar! instead. D: cd Sphinx_UE4_Demo\\Plugins\\sphinx-ue4\\voice_data @ec Jan 21, 2012 · I want to write a Windows batch file script that will loop through a text file of FILE PATHS, do some work using data from each file path, then ultimately delete the file. Hot Network Questions Feb 21, 2013 · Note: The question title states that you want to loop over "every character in variable string", which suggests the input file only contains a single line, because the command (set /P MYTEXT=)<C:\MYTEXTFILE. command Specifies the command to carry out for each file. Normally, an entire FOR loop is evaluated as a single command even if it spans multiple lines of a batch script. GOTO - Direct a batch program to jump to a labelled line. I started by running the FORFILES command and sending its output ( the @PATH parameter is the full path of any file it matches ) to a text file (results. Dec 11, 2012 · To access a changed variable such as the time variable, you must use !! or set with !! (have enableddelayexpansion enabled). txt will only read the first line of C:\MYTEXTFILE. batch, setting a string variable in a for loop. ), depending on the provided option string; refer to FOR /F for details It was working very good when i had variables manually set in batch like this : but the problem starts when I try to use for loop for all this variables Sep 20, 2011 · Since we're iterating the variable within the FOR loop, you have to use ! around the variable, however, in conjunction with the method :~#,-# to remove characters from the end of the variable, it doesn't take. If you need to preserve a single variable from the loop, have the loop ECHO the result of the variable, and use a FOR /F loop in the MainFile. Oct 23, 2013 · [ for every variable name (!) in the list remove the extension from the variable content (!) and save back to the same variable ] Question: How can i remove the extension of the filenames which are saved in the variables _WRLNG, _WRx64, _WRx32 and save this filename (without extension) back to the same variables ?? Sep 3, 2015 · I have a first loop and a second loop but the variable from the first loop always stays the same in the second loop. g. Jun 25, 2015 · You can put it into a single variable with including linefeeds. Feb 28, 2018 · Taking the substring of the variable of a for loop in a batch file. Someone can help me? @echo off &amp; setlocal enabledelayedexpansion set var[0]=aaa set var[1]= Jan 27, 2019 · I want to assign a filename to a variable for string manipulation. setlocal EnableDelayedExpansion set LF=^ REM The two empty lines are required here set "output=" for /F "delims=" %%f in ('dir /b') do ( if defined output set "output=!output!!LF!" Taking the substring of the variable of a for loop in a batch file. This means %c% in your echo %%i, %c% expanded instantly and so is actually used as echo %%i, 1 in each loop iteration. \*) do @echo %fsubdirs in current dir: for /D %s in (. mgc) do ( set "b=%%~nf" echo !b! May 10, 2018 · Basically, your string will be split into tokens using the underscore as a delimiter (delims=_). If config. How do I use a variable outside the for loop in batch file? 1. Hot Network Questions Oct 19, 2016 · for loop splitting PATH at ';' and properly managing quotes for loop looking at all previously stored paths; only extend the array if this is a new path to be added; glue the array pack together, clearing the array variable as we go; replace the path and clear the temporary variables; return from function with no errors. Feb 17, 2017 · I am creating a batch file to change the raw files to wav files and change the file name with a number stored in buffer and increment them. cmd @ECHO OFF ECHO. Batch file 'for' loops - multiple lines. The variable ITER itself is updated in the loop properly. FOR-Loop through a set of files in one folder, or a list of folders. Ex. \input\*. If you know the answers, or have any ideas/clues on how to reach the answer, please share them. doesn't answer the question). var is the variable name and value is what you are setting it too. Basically, the for loop gets parsed once. Delayed variable expansion is often useful when working with FOR Loops, normally an entire FOR loop is evaluated as a single command even if it spans multiple lines of a batch script. Also, you should remove the space before the assignment operator. So far in for loop, we have used ‘%%’ followed by a single letter. Once you understand how the FOR loop is interpreted, you'll know how to circumvent its limitations. Batch File: How can I extract the substring of a value from a FOR loop using an index variable? 0. Sep 15, 2012 · I want to write batch file which will loop through all directories containing backup directory and remove files older than X days within it. echo off for /f %%a IN ('dir /b *_ah. Mar 25, 2016 · I want to do something in batch for loop in a range of numbers. Jun 12, 2017 · Delayed variable expansion is what allows you to assign the single-letter loop variables (u and v in this case) to real variables and use them in the rest of the loop, by accessing them with ! instead of %. I am reading the total count of them and then run a for loop like this: @echo off setlocal enabledelayedexpansion set argCount=0 for %%x in (%*) do Jan 17, 2013 · I use the below code in order to create a directory from the value of the first 4 chars of collector text file. But you can set a variable without delayed expansion. So the actual FOR loop we are executing is: for %i in (*) do set LIST= %i I have a batch script which loops and I want to count how many cycles it has done. Using variable in sub-string operation in batch file FOR loop. If you want to loop over all lines in a file instead, the solution is a bit more in that it will not build up a list of files in the current directory, but instead will just set the LIST variable to the last file found. Example (using the same LOOP. exe to execute a for loop from a *. What you need, therefore, is a delayed evaluation, otherwise called delayed expansion Dec 15, 2014 · Problem is that I could not dereference the loop variable and check it in Environment variable. . I then use this to create a for loop that iterates for each chapter. txt had those '=' signs then you would have to skip add two more lines for the var's. Sample code is as below: @ECHO OFF SETLOCAL ENABLEDELAYEDEXPANSION FOR %%G IN (JBOSS_HOME, JAVA_HOME, ANT_HOME, PERFORCE_PATH, P4CLIENT) DO ( ECHO. mp3) do ( echo %%i set episodeName=%%i set episodeName=!episodeName:~0,-4! echo !episodeName! mkdir !episodeName! Mar 16, 2016 · When running the program, the variable next will skip the value of 3 if the maxlength variable is greater than 3. SET VARIABLE FROM A TEXT FILE. windows; batch-file If you don't need the variable !var! elsewhere in the In a batch file, how can I get the last token in a variable regardless of whether it is a number or a word and regardless of how many tokens/words there are in the variable. It never assigns the value, its always blank. Then just run endlocal %returnstring% which should expand to setlocal &set "A=B"&set "C=D"&set "E=F" then exit /b and all those variables should be available after the subroutine has finished. Loops are used to execute a specific task continuously until it reaches the number of times specified by the programmer. txt Set collector_id=!txt_file:~0,4! Sep 20, 2012 · You'll want to look at the EnableDelayedExpansion option for batch files. help set also will tell you about delayed expansion. From the aforementioned link: Delayed variable expansion is often useful when working with FOR Loops. Windows Batch won't let me break long "FOR" loop into Feb 8, 2016 · Since batch does not allow a metavariable to be substringed, you need to put it into a common environment variable and invoke enabledelayedexpansion. I want to create a for loop that uses user input variables in it's parameter. 3. flv) do ffmpeg. If you want to save the stuff both before and after the underscore, try: ECHO Start of Loop FOR /L %i IN (1,1,5) DO ( ECHO %i ) The 1,1,5 is decoded as: (start,step,end) Also note, if you are embedding this in a batch file, you will need to use the double percent sign (%%) to prefix your variables, otherwise the command interpreter will try to evaluate the variable %i prior to running the loop. During the parse phase, all variable reads are removed, being replaced with the value in the variable before the code starts to execute. txt. For example (I may be wrong): @echo off for /L %%a in (1,1,2) do ( goto loop ) :loop echo this won't loop for 2 times. In the current structure the way that the DEFINED check is done causes unexpected output when you assign the value from Arr to a temporary variable inside the loop: Nov 3, 2014 · I have a TXT file that contains : C086002-B3116 C086014-T1234 C086014-T1325 C086014-T1375" C086014-T1374" These strings include both trailing whitespaces and double quotes. Batch File: For Loop not May 28, 2013 · You shouldn't use %1% or plain numbers for variables, it can mess it up. To get the value that was set within the loop you should use delayed expansion. Hot Network Questions Jan 17, 2013 · If you set a variable inside a block (e. Using variable in Batch FOR loop. Jan 30, 2023 · This tutorial will show how to use a FOR loop in a Batch Script. The same problem exists for the adarshr suggestion - !suffix! is not expanded until after the FOR statement has been How to send variable to a background process, which is a loop :label of the bat itself (or stop loop if variable defined) 0 bat script 'for /F' loop filtered results Dec 9, 2016 · The variable whose expansion should be delayed should be surrounded by exclamation marks instead of percent signs. EDIT: I am working in Windows. SETLOCAL - Control the visibility of variables inside a FOR loop. Thanks for the observation – Oct 5, 2017 · You seem to misinterpret the for /F loop: it is capable of splitting a line of text into multiple tokens, but these are not iterated through, the tokens are returned in the same iteration, but by multiple loop variables (%%i, %%j, etc. To avoid this, you could use the delayed expansion, this works like percent expansion but just in the moment of execution @echo off setlocal EnableDelayedExpansion SET ITER=0 for %%i in (%*) do ( SET /a ITER+=1 ECHO !ITER! I am trying to create a batch script for my Windows machine that loops through a list of (string/decimal) values and uses each value as a parameter inside the loop. For example if a directory was changed it would look in that directory rather than the one the batch file is in. Apr 24, 2014 · Nested For Loop Variables Batch. Batch, variable inside variable in a for loop. 32. The reason you should use this for custom variables is because you could name the variables by there specific meaning which may make it easier to remember when coding. 0. Oct 6, 2021 · How to set a variable. Using variable inside of for loop. Jan 3, 2018 · I've also found questions here and here which kinda show how to do the assignment of the of the environment variable to the for loop variable, however its not working for me. batch-file; cmd; Windows batch variable in for-loop. setlocal enableextensions enabledelayedexpansion set b=123 for %%f in (. Format is " BATREN. Then after the for loop is done you should end up with a string like this &set "A=B"&set "C=D"&set "E=F" stored in some variable. IF - Conditionally perform a command. Nov 20, 2020 · Look at the following examples Example 1: The following code DOESN'T use delayed expansion, so the variables in the for loop are expanded only one time. , if, for), you need to enable delayed variable expansion with setlocal EnableDelayedExpansion. Let's say for example my directory contains the following files: File1. Apr 30, 2015 · Windows batch variable in for-loop. ECHO Simple test demonstrating loop breaking. In your case the whole FOR loop and its block is read and all variables, except the loop variables are expanded to their current value. @ECHO OFF cd C:\test for %%i in (*. It is good to keep variable names short and meaningful. This would make sure you are referencing a file in the directory the batch file is in. But to loop through files using for loop, we have to use ‘%’ followed by a single letter like %y. (I want to pass this variable as an argument to some batch file as follows Sep 8, 2016 · This is a workaround that solves the specific problem differently. May 21, 2020 · I'm currently trying to convince the cmd. -1 from me. Aug 11, 2016 · Also keep in mind that setlocal/endlocal actually limit scope of things changed inside so that they don't leak out. SETLOCAL - Control the visibility of environment variables inside a loop. So I'm still confusing about the batch syntax. lqbcsu haswcd ehkekjua qrzhtnh qidsv qcaitv quz yrjrr nmno jibms