# range包前不包后
# 7,6,5,4,3,2,1 for i in range(7, 0, -1): print(i)
print("*" * 20)
# 0,1,2,3,4,5,6 for i in range(0, 7): print(i)
print("*" * 20)
# 0,1,2,3,4,5,6 for i in range(7): print(i)
# range包前不包后
# 7,6,5,4,3,2,1 for i in range(7, 0, -1): print(i)
print("*" * 20)
# 0,1,2,3,4,5,6 for i in range(0, 7): print(i)
print("*" * 20)
# 0,1,2,3,4,5,6 for i in range(7): print(i)