if-elif语句练习
weight = float(input('请输入体重公斤数'))
height = float(input('请输入身高米数'))
bmi = (weight/(height**2))
if bmi < 18.5:
print('过轻')
elif 18.5 <= bmi < 25:
print('正常')
elif 25 <= bmi < 28:
print('过重')
elif 28 <= bmi < 32:
print('肥胖')
else :
print('严重肥胖')
pass