>>> x = 100
>>> y = 10
>>> x < y and x or y
10
>>> x if x > y else y
100
if 语句：
>>> x = 10
>>> if x == 10:
... print(x)
...
10
>>> if x == 10:
... print(x)
... else:
... print("x not 10!")
...
10
>>> if x == 10:
... print(x)
... elif x == 100:
... print(x)
... else:
... print(x)
...
10
while循环：
super@super:/python$ cat w.py
#!/usr/bin/env python
list1=[1,2,3,4,5,6,7,8,9,10]
sum = 0
while list1:
sum += list1[0]
list1 = list1[1:]
print(sum)
super@super:/python$ python w.py
55
for循环：
super@super:/python$ cat f.py
#!/usr/bin/env python
list1 = [1,3,5,6,9]
for i in list1:
print(i)
super@super:/python$ python f.py
1
3
5
6
9
else语句：
super@super:/python$ cat f.py
#!/usr/bin/env python
list1 = [1,3,5,6,9]
for i in list1:
print(i)
else:
print("while is normal over!")
super@super:/python$ python f.py
1
3
5
6
9
while is normal over!
break语句：
super@super:/python$ cat f.py
#!/usr/bin/env python
list1 = [1,3,5,6,9]
for i in list1:
print(i)
break
else:
print("while is normal over!")
super@super:/python$ python f.py
1
continue语句：
super@super:/python$ cat f.py
#!/usr/bin/env python
list1 = [1,3,5,6,9]
for i in list1:
if i == 5:
continue
print(i)
else:
print("while is normal over!")
super@super:/python$ python f.py
1
3
6
9
while is normal over!