diff --git a/day4/TODO.py b/day4/TODO.py
index c02b7f1..5936270 100644
--- a/day4/TODO.py
+++ b/day4/TODO.py
@@ -12,4 +12,5 @@ for i in list:
         continue;
     else:
         print('未尽之事：',list)
-        break;
\ No newline at end of file
+        break;
+#为什么没用到i也可以用i来进行循环
\ No newline at end of file