diff --git a/Software/Development/Language/Go/Basic/Go_语言字符串操作.md b/Software/Development/Language/Go/Basic/Go_语言字符串操作.md
index 3fc7417..09f5050 100644
--- a/Software/Development/Language/Go/Basic/Go_语言字符串操作.md
+++ b/Software/Development/Language/Go/Basic/Go_语言字符串操作.md
@@ -34,3 +34,9 @@ strings.Count("widuu", "u")     // 在一段字符串中有多少匹配到的字
 strings.Index("widuu", "i")     // 查找字符串, 然后返回当前的位置, return 1
 strings.Index("widuu", "u")     // 查找字符串, 然后返回当前的位置, return 3
 ```
+
+## 4.字符串长度
+
+```go
+fmt.Println(len("Hello"))
+```