for i in range(10):
		print(i)
# 0 1 2 3 4 5 6 7 8 9

for i in range(1, 10):
    print(i)
# 1 2 3 4 5 6 7 8 9

for i in range(10, 1):
    print(i)
# (노 출력)

for i in range(10, 1, -1):
		print(i)
# 10 9 8 7 6 5 4 3 2