How to iterate the list value one by one and add the previously stored value

You need to iterate the list and pass the previous sum.

Enum.reduce, or simple recursion should do it.

For example using an acc like {, 0}

You also need to parse string to integer in the process…

My question is the same. How can i store the previous sum value as another variable, to add it to newly coming value.

The 0 is the previous sum value in the acc.

It would look like this…

{list, _} = Enum.reduce(list, {[], 0}, fn %{"minimumAmount" => ma_str} = x, {l, sum} -> 
  new_sum = sum + String.to_integer(ma_str)
  {[%{x | "minimumAmount" => to_string(new_sum)} | l], new_sum}
end)

At the end, You might want to reverse the list.

As @kokolegorille have said, you can reduce the list using an accumulator

Enum.reduce(your_list, 0, fn x, acc → acc + String.to_integer(x[“minimumAmount”]) end)

You probably need to pass a list as well in the acc, because it is the return value.

you are right:), so @Nishanthg follow the @kokolegorille answer.

My solution only returns the sum of minimum amounts.

Thank you so much.