How do I create a .bat file that will make iterative file names?

Question

I'm new to writing batch files so I'm still a trying to work things out. Basically, I want to create a .bat file that will create a list of directories with a incremented number on the end. For my example I will get files with the names "Week1", "Week2", "Week3" ... "Week52". My code is as follows:

set "prefix=Week" for /l %%x in (1, 1, 52) do ( set /a num=%%x set direc=%prefix%%num% mkdir %direc% )

I think the trouble comes on the line where I concatenate the string and the numbers but I'm not 100% sure. Any pointers/corrections? Thanks in advance!

Don't bother setting `%num%` at all; just use `%%x` as a suffix. — SomethingDark, Jan 03 '16 at 16:44
ChrisF - I just got an error for each command and one folder named "Week". — GBean, Jan 04 '16 at 23:13

score 1 · Accepted Answer · edited May 23 '17 at 12:23

1

you need delayed Expansion:

setlocal enabledelayedexpansion
set "prefix=Week"
for /l %%x in (1, 1, 52) do (
  set /a num=%%x
  set direc=%prefix%!num!
  mkdir !direc! 
)

but why creating variables?

set "prefix=Week"
for /l %%x in (1, 1, 52) do mkdir %prefix%%%x

edited May 23 '17 at 12:23

Community

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answered Jan 03 '16 at 16:47

Stephan

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First code with delayedexpansion. Should be : `set direc=%prefix%!num! mkdir !direc! )` – SachaDee Jan 03 '16 at 17:39
@SachaDee yes, of Course, that's the Point. Got lost during editing the second Code snipped :( Corrected. – Stephan Jan 03 '16 at 19:10

How do I create a .bat file that will make iterative file names?

1 Answers1