Win bat file: How to add leading zeros to a variable in a for loop? [duplicate]

Answer 1

Prefix the string with zeros and then take the desired count of characters from the right side:

@echo off
set count=5
setlocal EnableDelayedExpansion

for /L %%i in (1, 1, %count%) do (
     set "formattedValue=000000%%i"
     echo !formattedValue:~-3!
)

Outputs:

001
002
003
004
005

Answer 2

Using the setlocal enabledelayedexpansion, the solution is this:

@echo off
setlocal ENABLEDELAYEDEXPANSION
set count=5

for /L %%i in (1, 1, %count%) do (
     echo %%i
     set j=00%%i
  rem to display intermediate values inside loop, surround with !
     echo !j!
)
endlocal

Here is a good reference: http://blog.crankybit.com/why-that-batch-for-loop-isnt-working/