diff --git a/day03/src/com/inmind/circle06/Demo11.java b/day03/src/com/inmind/circle06/Demo11.java
new file mode 100644
index 0000000..434eca6
--- /dev/null
+++ b/day03/src/com/inmind/circle06/Demo11.java
@@ -0,0 +1,23 @@
+package com.inmind.circle06;
+/*
+死循环：循环条件永远满足
+*/
+public class Demo11 {
+    public static void main(String[] args) {
+        //最重要最常用的死循环
+        int i = 1;
+        /*while (true) {
+            System.out.println(i++);
+        }*/
+
+        //for的死循环
+        /*for(;;){
+            System.out.println(i++);
+        }*/
+
+        //do-while死循环
+        do{
+            System.out.println(i++);
+        }while (true);
+    }
+}