# while
print('----while') 
i = 0
while i < 7:
    i += 1
    if i==2:
        continue # 跳过
    print(i)
    if i==5:
        break # 跳出循环
        
print('----while else')     
# while else
i = 0        
while i < 7:
    i += 1
    print(i)
else: # break 时 不会进入此语句
    print("循环结束") 
    
# for
print('----for')    
fruits = ["apple", "banana", "cherry"]
for x in fruits:
    print(x)
# for break continue
print('-----for break continue')    
for x in range(10):   
    if x==2:continue
    if x>7: break
    print(x)
else: print('for结束') # break 时不会进入else 

# for else
print('-----for else')    
for x in range(3):   
    print(x)
else: print('for结束')

# for pass
print('-----for pass')    
for x in range(3):   
    pass
else: print('for结束')