adding the elements of list [ - what is the sum of an empty list[ alternativelywe might want to accumulate the items in list in some way for examplewe might want to sum the numbers in list this is another example of applying an operation to each item in list this time the operation is folding the list itemsvalues into some final result in this case we would probably need an initial value of the result that it takes before any items get folded into it what is the sum of an empty listzerois that an integer zeroa floating point zeroor complex zero