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Arrays can be emulated in the delayed expansion mode using the combination of % and ! to indicate variables. There, %i% is the value of variable i with the immediate expansion while !i! is the value of variable i in the delayed expansion.

@echo off
setlocal EnableDelayedExpansion
for /l %%i in (1, 1, 10) do (
  set array_%%i=!random!

for /l %%i in (1, 1, 10) do (
  echo !array_%%i!

:: For each item in the array, not knowing the length
set i=1
if not defined array_%i% goto endloop
set array_%i%=!array_%i%!_dummy_suffix
echo A%i%: !array_%i%!
set /a i+=1
goto startloop


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