day3

python是一门解释型的、强类型的、动态语言

一:数字类型

1.1 整型int:记录人的年龄、等级、号码、个数

age = 18

print(type(age))

1.2 浮点数float:记录人的薪资、身高、体重

salary = 3.7

print(type(salary))

x = 18

y = 3.7

print(x + y)

print(x > y)

二:字符串:记录描述性质的状态,比如名字、一段话、性别

x = "两个黄鹂鸣翠柳"

y = '两个黄鹂鸣翠柳'

m = """两个黄鹂鸣翠柳"""

n = '''两个黄鹂鸣翠柳'''

print(x)

print(y)

print(m)

print(n)

msg = "my name is 'egon'"

print(msg,type(msg))

gender = 1

gender = 0

age # 变量名

"age" # 变量值的一种,str

了解:

print("abc"+"xxx")

print("abc"*3)

print(""50)

print('hello')

print(""50)

三 列表:按照位置存放多个值,比如记录一个人的爱好

hobbies = "打篮球 阅读 看电影"

0 1 2

hobbies = ["打篮球", "阅读", "看电影"]

print(hobbies[0])

print(hobbies[1])

print(hobbies[2])

print(hobbies[3])

print(hobbies[-1])

print(hobbies[-2])

# 0 1 2 3

l1 = [1111,1.3333,"aaa",['bbb','ccc']]

print(type(l1))

print(l1[3][0])

四:字典类型:在{}内,按照key:value的格式存放多个元素,其中value可以是任意类型,而key通常是str类型

info = ["egon", 18, 1.8, 80, "male"]

info = {

"name": "egon",

"age": 18,

"height": 1.8,

"weight": 80,

"gender": "male"

}

print(info["name"])

print(info["xxxx"])

info = ["egon",18,"male"]

dic = {"k1":11111,"k2":1.3,"k3":"xxx",'k4':[111,222,333],"k5":{"a":1,"b":2}}

print(dic['k4'][1])

print(dic['k5']["a"])

五 布尔:记录真假

print(type(True))

print(type(False))

x = True

y = True

#print(10 > 3)

dis =

print(dis["k4"][1])

posted @ 2021-05-31 18:32  章建国123  阅读(43)  评论(0编辑  收藏  举报