python循环语句

python的循环代码

 

循环结构 for {var} in {list}

1.range():       获取数字的范围

       >>>range(7)

[0, 1, 2, 3, 4,5, 6]

>>>range(2,4)

[2, 3]

>>>range(1,8,3)

[1, 4, 7]

 

>>> fori in range(5):

       print i

 

      

0

1

2

3

4

 

2.跳到下一项与跳出循环

       continue:       跳到下一项

 

       >>>for i in number:

       ifi==1:

              continue

       else:

              printi

 

             

2

3

4

 

break：         跳出循环

>>> fori in number:

       if i==2:

              break

       else :

              print i

 

             

1

@else语句允许为for循环添加另外一个代码块。只有当你不想跳出for循环时，才会运行这个代码块

>>> fori in number:

       if i>4:

              break

       else:

              print i

else:

       print 'no number more than four'

 

      

1

2

3

4

no number morethan four

 

 

3.    while循环

 

       while number[i]<3:

       i=i+1

>>> i

2