diff --git a/day03/src/com/inmind/dowhile05/Demo10.java b/day03/src/com/inmind/dowhile05/Demo10.java
new file mode 100644
index 0000000..e7ecf3b
--- /dev/null
+++ b/day03/src/com/inmind/dowhile05/Demo10.java
@@ -0,0 +1,31 @@
+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：不管循环条件是否满足，优先执行一次循环体语句，再去判断循环条件
+*/
+public class Demo10 {
+    public static void main(String[] args) {
+        //打印1~10
+        int k = 1;
+        do{
+            System.out.println(k);
+            k++;
+        }while(k<=10);
+
+        //打印10~1
+        int k1 = 10;
+        do{
+            System.out.println(k1);
+            k1--;
+        }while(k1>=1);
+
+
+        System.out.println("程序结束");
+    }
+}