- C20250013's blog
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C20250013 LV 5 @ 2023-5-22 15:22:58
| IDLE可以直接交互，人输入代码，电脑直接输出结果。电脑提示符号>>> | |
|---|---|
| 编写好代码，再保存代码，F5运行 | |
| Python 语法简洁的可交互的高级语言 | 10.80.74.11:8001/ |
| print语句 | |
| print(5//3) | 1 |
| print(5/3) | 1.66666...667 |
| print(2**5) | 32 |
| print(3**0.5) | 1.732... |
| print(5%3) | 2 |
| print("hello") | hello |
| print('hello') | 单引号括住的也是字符串 |
| print('he says,"ok"') | he says,"ok" |
| print(1,2,3) | 1 2 3 |
| print("a",20,"cd") | a 20 cd |
| print(20,'u',30,**sep='+'**) | 20+u+30 |
| print(5,2,9,sep='good') | 5good2good9 |
| print(5,2,9,sep='') | 529 |
| print(5)print(2) | 52 |
| print(5,end='ok'**)**print(2) | 5ok2 |
| print(2,3,sep=' ',end='\n') | 2 3 |
| print(' *')print(' ***')print('*****') | |
| 常用数据类型:int,float,str,list | |
| int | 整数 |
| float | 浮点数 |
| str | 字符串 |
| int("52") | "52"是字符串,int("52")将得到数字52 |
| str(52) | str(52)得到字符串"52" |
| float("52.1") | 得到浮点数52.1 |
| n=input() | 如果输入52，n会等于"52"input()函数返回值的类型是字符串 |
| print("pine"+"apple") | pineapple |
| print("ok"*3) | okokok |
| print("ok"+2) | TypeError: must be str, not int |
| 字符串的切片 | |
| s = "hello, guys"print(s[0]) | h |
| print(s[5]) | , |
| print(s[-1]) | s |
| print(s[-2]) | y |
| print(s[0:5]) | hello |
| print(s[1:3]) | el |
