initial_value: The start value for the accumulator. Eg., 0
array: The array to evaluate. Eg., A2:A8
lambda: The function to be applied to each value in the given array.
accumulator: The total value returned as result. Eg., a
value: A variable indicating the values to be used in calculation. Eg., b
calculation: The calculation applied to each value in the input. Eg., a+b