>>> exp='welcom to python'

>>> for i in exp:

print(i,end=' ')

w e l c o m t o p y t h o n

>>>

---

>>> weeks=['星期一','星期二','星期三','星期四','星期五','星期六','星期天']

>>> for day in weeks:

print(day,len(day))

星期一 3

星期二 3

星期三 3

星期四 3

星期五 3

星期六 3

星期天 3

>>>

 

---

>>> range(3)

range(0, 3)

>>> list(range(3))

[0, 1, 2]

>>> for i in range(3):

print(i)

0

1

2

>>>

---

>>> for i in range(3,6):

print(i)

3

4

5

>>>

---

>>> for i in range(2,9,2):

print(i)

2

4

6

8

>>> for i in range(2,8,2):

print(i)

2

4

6

>>>