age =3ifage >=18:print('your age is', age)print('adult')else:print('your age is', age)print('teenager')
age =3ifage >=18:
print('adult')elifage >=6:
print('teenager')else:
print('kid')
>>> height = 1.75
>>> weight = 80.5
>>> tmp = (weight/height)*(weight/height)
>>> if tmp < 18.5:
... print('低于18.5：过轻')
... elif 18.5 < tmp < 25:
... print('18.5-25：正常')
... elif 25 < tmp < 28:
... print('18.5-25：正常')
... elif 28 < tmp < 32:
... print('28-32：肥胖')
... elif 28 > 32:
... print('高于32：严重肥胖')
... else :
... print('未知')
...
未知
