day2:day1作业 字符编码

时间:2023-01-02 22:41:49

1,使用while循环输出1,2,3,4,5,6,8,9

# 使用while循环输出1,2,3,4,5,6,8,9
num = 1
while num <= 10:
    if num != 7:
        print (num )
    num += 1

num = 1
while num < 10:
    num +=1
    if num ==7:
        continue
    print(num)

num = 1
while num < 10:
    num +=1
    if num ==7:
        pass
    else:
        print(num)

2,输出0-100内所有奇数的和

#输出0-100内所有奇数

num = 1
sum = 0
while num <=100:
    if num%2 !=0:
        sum +=num
    num +=1
print(sum)

num = 1
sum = 0
while num <=100:
    sum +=num
    num +=2
print(sum)

3,print long messge 注意变量类型,个数要对应的上,不然会报错

"""

Version     : 0.1
Author      : Lisa
Date        : 2018/11/25 8:02 AM
Description : 

"""

msg ='''--------------info of lisa------------

name:lisa
age:22
job:developer
Hobbies:piano,yoga

------------------end-----------------------'''
print(msg)

--------------info of lisa------------

name:lisa
age:22
job:developer
Hobbies:piano,yoga

------------------end-----------------------
"""

Version     : 0.1
Author      : Lisa
Date        : 2018/11/25 8:02 AM
Description : 

"""
age = int(input("please input your age:"))
name =input("please input your name:")
height=int(input("please input you height:"))
msg="my name is %s, i am %d, my height is %d" %(name,age,height)
print(msg)

please input your age:22
please input your name:lisa
please input you height:165
my name is lisa, i am 22, my height is 165

4,如果字符串里面已经有了单引号的三引号,那么外面要用栓双引号的三引号,不然会报错

5,字符串里面打印%

sg="my name is %s, i am %d, my height is %d,学习进度3%" %(name,age,height)
print(msg)
注意观察,这样写的话, pycharm字符串会标黄,提示语法有问题

运行结果
please input your age:22
please input your name:lisa
please input you height:165
Traceback (most recent call last):
  File "/Users/guolixiao/PycharmProjects/lisa's_practise/boys/2.1.py", line 12, in <module>
    msg="my name is %s, i am %d, my height is %d,学习进度3%" %(name,age,height)
ValueError: incomplete format

正确写法,应用%来转义
msg="my name is %s, i am %d, my height is %d,学习进度3%%" %(name,age,height)
print(msg)

运行结果:
please input your age:22
please input your name:lisa
please input you height:165
my name is lisa, i am 22, my height is 165,学习进度3%

输出%d
msg="my name is %s, i am %d, my height is %d,学习进度3%%d" %(name,age,height)
print(msg)

运行结果:
my name is lucy, i am 22, my height is 167,学习进度3%d

6,while else,只要while循环不被break跳出,else部分就会被执行

7,电脑的传输还有储存实际上都是0101010这种的,电脑的成千上万的二极管等设备可以实现高地电平

8,美国发明了ASCII码,由于英文字符加符号很少,所以一开始就设计了7位 可以储存128个字符,发明者还是有先见的,多用了一个第8位以防字符不够用,但是虽然这样,还是明显不够用,ASCII码最左边一位永远是0,中文汉字有9万多个,美国为了解决全球化的文字问题,发明了一个万国码也就是Unicode,一开始给了中文两个字节,但是只可以储存65535个字,明显不够用,后来给了四字节,但是又太多了,会造成很多浪费,中文3个字节足以,所以后来有了一个升级版本的万国码就是UTF-8,使用3个字节储存中文,一个字节表示英文,两个字节其他,GBK是中国人发明的,用两个字节表示一个汉字,只在国内用。