save project

1.py

@@ -121,15 +121,15 @@ print(string[-10:-4:6])
 """
 """
 
 
 #题目：截取"llo w"
 #题目：截取"llo w"
-string = "Hello world"
+string = "Hello world!"
 print(string[2:7])
 print(string[2:7])
 print(string[2:-4])
 print(string[2:-4])
 print(string[-9:7])
 print(string[-9:7])
 print(string[-9:-4])
 print(string[-9:-4])
 print("string[2:7]=",string[2:7])
 print("string[2:7]=",string[2:7])
-print("string[2:-4]=",string[2:-4])
-print("string[-9:7]=",string[-9:7])
-print("string[-9:-4]=",string[-9:-4])
+print("string[2:-5]=",string[2:-5])
+print("string[-10:7]=",string[-10:7])
+print("string[-10:-5]=",string[-10:-5])