1、for循环
普通遍历
a = ['aaa','bbb','ccc']
for x in a:
print(x)
嵌套列表遍历
a = [['aaa','bbb','ccc'],(1,2,3)]
for x in a:
print(x)
嵌套for循环遍历
a = [['aaa','bbb','ccc'],(1,2,3)]
for x in a:
for y in x:
print(y)
else
a = [1,2,3]
for x in a:
print(x)
else:
print('退出')
break
a = [1,2,3]
for x in a:
if x == 2:
break
else:
print(x)
continue
a = [1,2,3]
for x in a:
if x == 2:
continue
else:
print(x)
range()
'''
range(
起始,
长度 ,
步长
)
'''
for x in range(0,10,2):
print(x,end=' ')
print()
a=['a','b','c','d']
for x in range(0,len(a),2):
print(x,end=' ')
print()
b=a[0:len(a):2]
print(b)
2、while
count = 0
while count<=10:
count+=1
print(count)
else:
print('结束循环')