lst = list(range(-10,0)) + list(range(1,11)) print(lst) def my_sum(lst): tong = 0 for number in lst: tong = tong + number #tong moi = tong cu + number return tong lst2 = [10, -1, 8, -22,10] print(my_sum(lst2)) #bai 4.5 b def my_product(lst): tich = 1 for char in lst: tich = tich * char return tich print(my_product(lst))