def list_sum(num_list):
    the_sum=0
    for i in num_list:
            the_sum=the_sum+i
    return the_sum
print(list_sum([1,3,5,7,9]))

def list_sum(num_list):
    if len(num_list)==1:
        return num_list[0]
    else:
        return num_list[0]+list_sum(num_list[1:])
print(list_sum([2,4,6,8,10]))
