while

基本语法

• for in
  • rang()
• while
  • break
  • continue

for in

举例子

for x in [1,2,3]:
    print(x)

while

举例子

while x < 0:
    print(x)
    x --

break 和 continue

for x in [1,2,3,4,5,6,7]:
    if i > 4:
        print('nnon')
        break
    if i == 5:
        print(i)
        continue

rang()

a = rang(9)

>>>>> a = [0,1,2,3,4,5,6,7,8]