Why is an extra file being created in FOR loop of batch program?

Question

I\'ve written the following batch file to create multiple files using FOR loop:

@echo off  
cls  
FOR /L %%i IN (1 1 10) DO (  
    echo.> file%%i.txt  
         


        

Answer 1

Like adarshr said, the second FOR loop can find even the new created files.
You can avoid this by using FOR/F with a command, as the result of the dir is completely fetched before the body of the loop is executed.

...
FOR /F "delims=" %%i IN ('dir /b *.txt') DO (  
    echo.> file%%i.txt
    IF ERRORLEVEL 0 echo Successfully created file 'file%%i.txt'.  
)