I was trying to search an article which will simply explain how to use arrays with Katalon recorder and could not find a relevant one, and I combined a few examples into a working solution for myself. Sharing for anyone who needs it.
I tried googling and could not find a relevant solution.
storeEval new Array('a','b','c','d','e'); Arr
store 0 n
while n<5
storeEval storedVars['Arr'][${n}] row_value
echo ${row_value}
type id=form_value ${row_value}
storeEval ${n}+1 n
endWhile