Batch Script Loop

Answer :

for /l is your friend:

for /l %x in (1, 1, 100) do echo %x 

Starts at 1, steps by one, and finishes at 100.

Use two %s if it's in a batch file

for /l %%x in (1, 1, 100) do echo %%x 

(which is one of the things I really really hate about windows scripting)

If you have multiple commands for each iteration of the loop, do this:

for /l %x in (1, 1, 100) do (    echo %x    copy %x.txt z:\whatever\etc ) 

or in a batch file

for /l %%x in (1, 1, 100) do (    echo %%x    copy %%x.txt z:\whatever\etc ) 

Key:
/l denotes that the for command will operate in a numerical fashion, rather than operating on a set of files
%x is the loops variable
(starting value, increment of value, end condition[inclusive] )

And to iterate on the files of a directory:

@echo off  setlocal enableDelayedExpansion   set MYDIR=C:\something for /F %%x in ('dir /B/D %MYDIR%') do (   set FILENAME=%MYDIR%\%%x\log\IL_ERROR.log   echo ===========================  Search in !FILENAME! ===========================   c:\utils\grep motiv !FILENAME! ) 

You must use "enableDelayedExpansion" and !FILENAME! instead of $FILENAME$. In the second case, DOS will interpret the variable only once (before it enters the loop) and not each time the program loops.

Template for a simple but counted loop:

set loopcount=[Number of times] :loop [Commands you want to repeat] set /a loopcount=loopcount-1 if %loopcount%==0 goto exitloop goto loop :exitloop 

Example: Say "Hello World!" 5 times:

@echo off set loopcount=5 :loop echo Hello World! set /a loopcount=loopcount-1 if %loopcount%==0 goto exitloop goto loop :exitloop pause 

This example will output:

Hello World! Hello World! Hello World! Hello World! Hello World! Press any key to continue . . .