1.场景一
print(1)
print(2)
print(3)
print(4)
print(5)
print(6)
print(7)
print(8)
print(9)
2.场景二
def p_num():
print(1)
print(2)
print(3)
print(4)
print(5)
print(6)
print(7)
print(8)
print(9)
p_num()
3.场景三
def p_num():
for i in range(1, 10):
print(i)
p_num()