条件判断-if

16.判断条件样式一

[root@VM_0_6_centos py]# cat 15.py

#!/usr/bin/evo

#coding:utf-8

#print ('判断条件if')

age=input('please enter U age:')

if age >=18:

print('U age is',age)

print('adult')

elif age >=6:

print('U age is',age)

print('teenager')

else:

print('U age is',age)

print('kid')

[root@VM_0_6_centos py]# python 15.py

please enter U age:5

('U age is', 5)

kid

[root@VM_0_6_centos py]# python 15.py

please enter U age:11

('U age is', 11)

teenager

[root@VM_0_6_centos py]# python 15.py

please enter U age:27

('U age is', 27)

adult

16.同上

[root@VM_0_6_centos py]# python 16.py

请输入你的生日(年份):2010

00后

[root@VM_0_6_centos py]# python 16.py

请输入你的生日(年份):1989

00前

[root@VM_0_6_centos py]# cat 16.py

#!/usr/bin/evo

#coding:utf-8

s=input('请输入你的生日(年份):')

birth=int(s)

if birth < 2000:

print('00前')

else:

print('00后')

17.判断+input

[root@VM_0_6_centos py]# cat 17.py

#!/usr/bin/evo

#coding:utf-8

a=input('请输入身高（例如1.76）:')

height=float(a)

b=input('请输入体重（例如80.5）:')

weight=float(b)

MI=height*height

BMI=weight/MI

if BMI < 18.5:

print('过轻')

elif 18.5< BMI < 25:

print('正常')

elif 25< BMI < 28:

print('过胖')

elif 28< BMI < 32:

print('肥胖')

elif BMI > 32:

print('严重肥胖')

比如昨天刚想明白X=（1，2，[3,4]）,X[2][0]