How to rename a set of files like this in the Windows command prompt?
current file names:
file111.txt file112.txt file113.txt
after renaming file names:
file0111.txt file0112.txt file0113.txt
How can I achieve this?
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for %%f in (file???.txt) do call :ren %%f goto :eof :ren set name=%1 ren "%name%" "%name:~0,4%0%name:~4%" :: Here, %name:~0,4% takes the first four characters, then you add a "0", :: and %name:~4% is everything after the fourth character.
Another possible way, which checks for all files starting with
file100.txt and so on, so might be slower:
for /l %f in (100,1,999) do if exist "file%f.txt" ren "file%f.txt" "file0%f.txt"
(If you want to put this in a batch file, you need to change
%%f, same as in the first example.)