1 teacher="bcyczhhb"
 2 print (teacher)
 3 
 4 first=3
 5 second=8
 6 third=first+second
 7 print(third)
 8 
 9 myteacher="bcyczhhb"
10 yourteacher="你的老师"
11 ourteacher=myteacher+yourteacher
12 print(ourteacher)
13 
14 zy="let's go"
15 print (zy)
16 
17 #此处要用到转义字符 \ 如果没有就不能正常打印反斜杠。
18 #在字符串前加个r 按正常输入也会成功。
19 #pf2和pf3前加\是为了输出的结果好看些。
20 #执行结果是 c:\abc\c:\Program Files\Common files\c:\Program Files\Common Files
21 
22 pf="c:\\abc"
23 pf2="\\c:\\Program Files\\Common files"
24 pf3=r"\c:\Program Files\Common Files"
25 print (pf+pf2+pf3)