From 5d9da9aa550f5a03fabd121340255231d0afe99f Mon Sep 17 00:00:00 2001
From: youyihj <youyi580@qq.com>
Date: Sun, 16 Oct 2022 22:39:58 +0800
Subject: [PATCH] indexed foreach

---
 advanced/loops.md | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/advanced/loops.md b/advanced/loops.md
index dd8a956..8a527be 100644
--- a/advanced/loops.md
+++ b/advanced/loops.md
@@ -71,13 +71,24 @@ while(j >= 0) {
 
 ```csharp
 // 定义一个数组并遍历
-var numbers as int[] = [2,4,8,16,32,64];
+var numbers as int[] = [2, 4, 8];
 for number in numbers {
     print(number);
 }
-// 输出 2, 4, 8, 16, 32, 64
+// 输出 2, 4, 8
+
+// 对于数组的 foreach，可以使用带索引的遍历法
+for i, number in numbers {
+    // i 变量代表现在遍历到哪个索引下的元素
+    print("Index: " + i + ", Element: " + number);
+}
+
+// 依次输出
+// Index: 0, Element: 2
+// Index: 1, Element: 4
+// Index: 2, Element: 8
 
-// 定义一个 Map 映射并遍历
+// 定义一个 Map (映射)并遍历
 var map as string[int] = {
     1 : "一",
     2 : "二",