From 6722dd3abd315ce35fbb50e11d7d85c32ceac6aa Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Thu, 16 Jul 2026 16:23:25 +0800
Subject: [PATCH] =?UTF-8?q?day03-=E5=BE=AA=E7=8E=AF=E6=B5=81=E7=A8=8B--?=
 =?UTF-8?q?=E4=B8=89=E7=A7=8D=E5=BE=AA=E7=8E=AF=E7=9A=84=E5=8C=BA=E5=88=AB?=
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---
 day03/src/com/inmind/dowhile05/Demo09.java | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 day03/src/com/inmind/dowhile05/Demo09.java

diff --git a/day03/src/com/inmind/dowhile05/Demo09.java b/day03/src/com/inmind/dowhile05/Demo09.java
new file mode 100644
index 0000000..c39c9d1
--- /dev/null
+++ b/day03/src/com/inmind/dowhile05/Demo09.java
@@ -0,0 +1,45 @@
+package com.inmind.dowhile05;
+/*
+三种循环的区别：
+使用场景：
+        for:数组的遍历，集合的遍历，字符串的遍历
+        while：io流
+        do-while:当循环体必须执行一次的时候
+
+不同之处：
+        当循环变量，直接不符合循环条件时，do-while一定会执行一次
+        for循环的循环变量，超出for的范围不能使用,就像没定义过一样
+*/
+public class Demo09 {
+    public static void main(String[] args) {
+        //for循环
+        for(int i = 11;i<=10;i++){
+            System.out.println(i);
+        }
+        for (int i = 0; i < 10; i++) {
+            System.out.println(i);
+        }
+        for (int i = 0; i < 10; i++) {
+            System.out.println(i);
+        }
+
+        //System.out.println(i);注意：此处的i超出了for循环范围，不能使用，没有定义过
+        System.out.println("-------------------------");
+        //while循环
+        int j = 11;
+        while(j<=10){
+            System.out.println(j);
+            j++;
+        }
+        System.out.println(j);
+
+        System.out.println("-------------------------");
+        //do-while循环
+        int k = 11;//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(k);
+    }
+}