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。