loop and pad a variable in batch with zeros

Question

Hi I'm trying to loop and pad some variables with 0 in a batch script. I've looked up on stackoverflow to do both but have some trouble weith percents and double percents.

The following fails to pad it with 0s. Where should I add percents here?

for /L %%i in (1,1,10) do (
    set "i=0%i%"
    set "i=%i:~-2%"
    echo "%%i"
)

http://stackoverflow.com/q/12518242/995714, http://stackoverflow.com/q/13805187/995714 — phuclv, Jun 13 '16 at 16:17

score 1 · Answer 1 · edited May 23 '17 at 12:31

1

if you change a variable and want to use it in the same block, you have to use delayed expansion:

setlocal enabledelayedexpansion
for /L %%i in (1,1,10) do (
    set "i=0%%i"
    set "i=!i:~-2!"
    echo "!i!"
)

edited May 23 '17 at 12:31

Community

1
1

answered Jun 13 '16 at 16:04

Stephan

53,940
10
58
91

thanks but no need for the downvote theres no way i could have googled this, i did try – simonzack Jun 13 '16 at 16:08
that wasn't me. Easy to google, if you know the right search term - if you don't, you're lost. – Stephan Jun 13 '16 at 16:10
if you search for something like "variable for loop in batch file" you'll get a lot of answers with delayed expansion and the use of `!` instead of `%` – phuclv Jun 13 '16 at 16:16
@LưuVĩnhPhúc yes - as soon as you know what the problem is, you will easily find the answers. Problem here was masked by confusion with `for` variables and "normal" variables. – Stephan Jun 13 '16 at 16:19

loop and pad a variable in batch with zeros

1 Answers1