loop and pad a variable in batch with zeros [duplicate]

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"
)

stackoverflow.com/q/12518242/995714, stackoverflow.com/q/13805187/995714 — phuclv
– phuclv, Commented Jun 13, 2016 at 16:17

Community · Accepted Answer · 2017-05-23 12:31:49Z

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, 2017 at 12:31

CommunityBot

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answered Jun 13, 2016 at 16:04

Stephan

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4 Comments

simonzack Over a year ago

thanks but no need for the downvote theres no way i could have googled this, i did try

Stephan Over a year ago

that wasn't me. Easy to google, if you know the right search term - if you don't, you're lost.

phuclv Over a year ago

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 %

Stephan Over a year ago

@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.

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