Количество повторение for i in range(5):
2) for i in range(12):
3) for i in range(1, 5):
4) for i in range(3, 5):
5) for i in range(1, 6, 2):
6) for i in range(1, 13, 2):
7) for i in range(10, 1, -1):
8)for i in range(20, 1, -2):