From bf333a182bd05be361dcc9589acad8f39b8d8315 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Thu, 17 Sep 2026 10:36:35 +0800
Subject: [PATCH] =?UTF-8?q?day03--=E5=BE=AA=E7=8E=AF=E6=B5=81=E7=A8=8B-for?=
 =?UTF-8?q?=E5=BE=AA=E7=8E=AF?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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---
 day03/src/com/inmind/for03/Demo05.java | 42 ++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 day03/src/com/inmind/for03/Demo05.java

diff --git a/day03/src/com/inmind/for03/Demo05.java b/day03/src/com/inmind/for03/Demo05.java
new file mode 100644
index 0000000..bc771fb
--- /dev/null
+++ b/day03/src/com/inmind/for03/Demo05.java
@@ -0,0 +1,42 @@
+package com.inmind.for03;
+/*
+for , while ,do-while 循环
+循环三要素：循环变量初始化、循环条件、修改循环变量
+
+for循环的格式：
+for(循环变量初始化①;循环条件②;修改循环变量④){
+        循环语句③
+}
+
+执行顺序：①②③④>②③④>②③④…②不满足为止。
+
+*/
+public class Demo05 {
+    public static void main(String[] args) {
+        //跑个10圈：1~10圈
+        for(int i = 1; i<=10 ;i++){
+            System.out.println("当前跑了第"+i+"圈");
+        }
+        System.out.println("------------------------------");
+        //跑个10圈：倒着数10~1
+        for(int i =10;i>=1;i--){
+            System.out.println("当前跑了第"+i+"圈");
+        }
+        System.out.println("------------");
+
+        //输出26个小写字母 a~z  ,字符的强转  a--97~+25,也可以直接用字符
+        for (int i = 97; i <= 122; i++) {
+            System.out.println((char) i);
+        }
+
+        System.out.println("-----------------------");
+        //其实在运算时，char本身会自动提升为int
+        for (char i = 'a'; i <= 'z'; i++) {
+            System.out.println(i);
+        }
+
+
+
+        System.out.println("程序结束");
+    }
+}