1# basic for loop
2
3def f():
4    for x in range(2):
5        for y in range(2):
6            for z in range(2):
7                print(x, y, z)
8
9f()
10
11# range with negative step
12for i in range(3, -1, -1):
13    print(i)
14
15a = -1
16# range with non-constant step - we optimize constant steps, so this
17# will be executed differently
18for i in range(3, -1, a):
19    print(i)
20