day6 break continue for

In [1]: name = "lanwang"

In [2]: for temp in name:
   ...:     print("----")
   ...:     print(temp)
   ...:     
----
l
----
a
----
n----
w
----
a
----
n
----
g

i = 1

while i <= 5:
    print("-----")

    if i == 3:
        break
    print(i)   
    i += 1


#运行结果
-----
1
-----
2
-----

i = 1
count = 0
while i <= 100:

    #if i 是偶数打印
    if i%2 == 0:
        print(i)
        count +=1

    if count == 20 :
        break

    i += 1

 i = 1
 
 while i <= 5:
     print("-----")
 
     if i == 3:
        # break
        continue #一次循环不执行
 
     print(i)
     i += 1
 
 print("=======")


#执行结果
-----
1
-----
2
-----
-----  #当i=3  时，永远跳出本次循环，下面的2行语句未能执行，一直重复
-----
-----
-----
-----
-----
-----
-----

i = 1

while i <= 5:
    i += 1                    #i+=1 放到前面？？？
    print("-----")
    
    if i == 3:
        #break
        continue  #结束一次循环,  转而下一次的循环

    print(i) 

print("=======")


#运行结果
-----
2
-----
-----
4
-----
5
-----
6
=======