if-elif条件判断，while循环和for…in循环

练习

小明身高1.75，体重80.5kg。请根据BMI公式（体重除以身高的平方）帮小明计算他的BMI指数，并根据BMI指数：

·                                低于18.5：过轻

·                                18.5-25：正常

·                                25-28：过重

·                                28-32：肥胖

·                                高于32：严重肥胖

用if-elif判断并打印结果：

# -*- coding: utf-8 -*-

 

height = float(input('输入身高：'))

weight = float(input('输入体重：'))

bmi =weight/(height*height)

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')

 

练习

请利用循环依次对list中的每个名字打印出Hello, xxx!：while循环和for…in 循环)

# -*- coding: utf-8 -*-

L = ['Bart', 'Lisa', 'Adam']

 

# -*- coding: utf-8 -*-

L = ['Bart', 'Lisa','Adam']

n = 0

while n+1 <= len(L):

    print('Hello',L[n])

n=n+1

# -*- coding: utf-8 -*-

L = ['Bart', 'Lisa','Adam']

for n in L:

    print('Hello',n)