第三节：while循环及while...else

while循环

age = 50 
#   python注释用'#'
#   user_age = int(input('age is:'))   
flag = True

while flag == True:
    user_age = int(input('age is:'))
    if user_age == age:
        print('你真牛逼')
        flag = False
    elif user_age < age:
        print('你想法太年轻了')
    else:
        print('你想法太成熟了')
print('游戏结束')

循环语句：while...else...

num = 1
while num<10:
  num += 1
  print(num)
  if(num == 3):
     break
else:
  print('循环里有break,我执行不了else语句')



num = 1
while num<10:
    num += 1
    print(num)
else:
    print('我执行了else语句')

#  print('hello wrorld', end='_')
#  while...else...   有break就不会执行了