I want to create a folder with specific name in a directory and if it already exists, it should create a folder with the same name but adding an index at the end. For instance creating folder 2017-07-31 in D:\path and if it exists, creates 2017-07-31_1 and if it still exists, creates 2017-07-31_2 etc.
set foldername=%DATE:~-4%-%DATE:~3,2%-%DATE:~0,2% set path=D:\path Better get the date in a locale/user settings independent format with wmic.
@Echo off For /f "delims=." %%A in ( 'wmic os get LocalDateTime^|findstr ^^[0-9]' ) Do Set DT=%%A Set "foldername=%DT:~0,4%-%DT:~4,2%-%DT:~6,2%" If Not Exist "%foldername%" MD "%foldername%" >Nul &goto :Next Set Num=1 :loop If Exist "%foldername%_%Num%" Set /A Num+=1 & goto :loop MD "%foldername%_%Num%" >Nul :Next :: your further code goes here 