diff --git a/day03/src/com/inmind/dowhile05/Demo08.java b/day03/src/com/inmind/dowhile05/Demo08.java
new file mode 100644
index 0000000..58e27c4
--- /dev/null
+++ b/day03/src/com/inmind/dowhile05/Demo08.java
@@ -0,0 +1,30 @@
+package com.inmind.dowhile05;
+/*
+循环变量初始化①
+do{
+    循环体③
+    修改循环变量④
+}while(循环条件②);
+
+执行顺序：①③④>②③④>②③④…②不满足为止。
+比较特殊：优先执行一次循环体语句
+*/
+public class Demo08 {
+    public static void main(String[] args) {
+        //打印1~10的值
+        int k = 1;//循环变量初始化①
+        do{
+            System.out.println(k);//循环体③
+            k++;//修改循环变量④
+        }while(k<=10);//循环条件②
+        System.out.println("-----------------------");
+        //打印10~1的值
+        int k1 = 10;
+        do{
+            System.out.println(k1);
+            k1--;
+        }while (k1 >=1);
+
+        System.out.println("程序结束");
+    }
+}