# Write a function that takes a list of integers
# and return the sum value of the list
#
# Example: for a given list [4, 5, 6, 7]
# the function will return 22
#
# Do not use any built-in functions except len()

def sum_list(lst):
    result = 0   # initialize the sum

    for num in lst:
        result += num
    
    return result


print(sum_list([4,5,6,7]))

print(sum_list([11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30]))

mylist = list(range(11, 31))
print(sum_list(mylist))

# list() transforms range(11,31)) into a list
# of 11, 12, 13, ..., 30