China DOS Union

I have downloaded some files from the internet, and the command rules are like 1.rm, 2.rm... 11.rm, 12.rm... 100.rm, etc.

It's not very pleasant to sort by file name in Windows Explorer. Is there a convenient way under DOS to uniformly complete to three (or a specified number of) digits, that is, 1.rm --> 001.rm, 11.rm --> 011.rm, etc.

Also, in some cases, there are some prefixes in front of the number, such as sanguo1.rm, which should be changed to sanguo001.rm, etc.

I've been trying the for command for a long time and it doesn't work. I'm asking for help from all the experts, please give more advice.

If your system is of the NT architecture, you can use the FOR statement for /l %%a in (1,1,99) do ren sanguo%%a.txt 0%%a.txt

for /l %%a in (1,1,99) do ren sanguo%%a.rm 0%%a.rm

Thanks to the person above.

I'm using Windows 2000, and all the answers you provided should be correct.

I just tried it and it basically worked. It did add a 0 in front of each file. Although it's not exactly what I wanted (where I could distinguish the number of digits and pad them to the corresponding number of digits, like sg1.rm to sg001.rm and sg10.rm to sg010.rm by adding only one 0), it's a bit cumbersome, but I can just use the command twice.

Also: I don't quite understand the grammar explanation yet. I'm looking for Windows help. If it's convenient for you, can you explain it a little?

Got it.
I know why it didn't work for a long time before. The thinking was wrong.
Before, my thinking was limited to getting variables from the file name. I never thought that I could directly use 1 - 99 as variables.
I originally used it like this: for %a in (sg?.rm) do echo ren %a...
It's obvious that the above sentence can list all the files that meet the requirements, but in the actual command, because the digital part cannot be obtained, it can only fail.

OK, thank you again to the upstairs. Not only did it solve the problem, but it also taught me a new way of thinking.

Without everyone learning from each other and practicing more, we can't find the answer

It's a bit troublesome with commands. Install a Mop Rename Utility, and you can change it however you want.

Indeed, I've learned a lot! The nt command line is really quite different from DOS!