In Haskell:

Code a function "rangeProduct" that takes two arguments. The function should return 0 if the second argument is smaller than the first, otherwise it should return the product of the range between two numbers, ex:

rangeProduct 3 5 --> 60 (because 3*4*5 = 60)

What to do for negative numbers to do (if anything) is up to you. Write the program without recursion first and then write it with recursion.