#recursive routine to sum a list of numbers
#program sumList (recursive).py
def addNums(numbers):
    if len(numbers) == 1:
        return (numbers[0])
    else:
        numbers[0] = numbers[0] + addNums(numbers[1:])
        print (numbers[0])
    return numbers[0]
	
#ENDSUB
marks = [3,6,2,8]


total = addNums(marks)
print ("Total v1 = ",total)
print("\n\nVersion 2, list of 4 numbers 3,6,2,8")

#version 2, worksheet 1 question 2
def addNums2(numbers):
    if len(numbers) > 1:
#        print ("Before call, numbers[0] =",numbers[0],
#               "length(numbers) = ",len(numbers))
        numbers[0] = numbers[0] + addNums2(numbers[1:])
    print (numbers[0])
    return numbers[0]
	
#ENDSUB
marks = [3,6,2,8]
total = addNums2(marks)
print ("Total v2 = ",total)