python 第一天学习内容

#if adn else 一般判断
#input 用户输入
'''
age_of_wuyue = input("请输入您的年纪:")

age_of_princal = int (age_of_wuyue)+20

guess_age = int(	input("请猜猜校长的年纪:"))
if guess_age==age_of_princal:
    print("yes,you got it.... ")
else:
    print("no,it's wrong....")
'''
#一般判断结束

#基本输入
'''
name = input("your name:")
age = input("your old:")
print(name,age)
'''
#基本输入输出结束

#input 接受的所有数据都是字符串，即便你输入的是数字，但依然会被当成字符串来处理
#string 把数据转成字符串用str
#integer 把字符串转成数据用int
'''
death_age=100
name=input("your name:")
age=input("your age:")
print(type(age))
print("your name:",name)
print("your can still live for" ,death_age-int(age),"yeats....")
'''
#多分支语句 elif

score=int(input("score:"))

if score>90:
    print("A")
elif score>80:
    print("B")
elif score>70:
    print("C")
elif score>60:
    print("D")
elif score>50:
    print("继续努力哦")
elif score>0:
    print("你已经被开除了")