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
:startloop
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
:endloop

Links:

• Arrays, linked lists and other data structures in cmd.exe (batch) script, stackoverflow.com