#addNumsR is a recursive version of a subroutine to add a list of numbers
#addNumsI is an iterative version of a subroutine to add a list of numbers
def addNumsR(numbers):
    if len(numbers) == 1:
         return numbers[0]
    else:
         return numbers[0] + addNumsR(numbers[1:])

#ENDSUB

def addNumsI(numbers):
     sum = 0
     for index in range(len(numbers)):
          sum = sum + numbers[index]
     return sum

print ("Recursive routine")
marks = [3, 6, 2, 8, 1]
total = addNumsR(marks)
print ("Total: ",total)


print ("Iterative routine")
marks = [3, 6, 2, 8, 1]
total = addNumsI(marks)
print ("Total: ",total)