diff --git a/UserInfoArray.md b/UserInfoArray.md
index 7cdce2f..469f581 100644
--- a/UserInfoArray.md
+++ b/UserInfoArray.md
@@ -21,4 +21,10 @@ public String getUserName(UUID uuid){ // 유저 이름 return
         return m_UserInfoArray.get(uuid).getUserName();
     }
 ```
-Input
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+* **Input**: uuid
+* **Output**: 유저 닉네임
+UserInfoArray로부터 return받은 UserInfo Instance의 getUserName에 접근하여 닉네임을 return
+
+
+* **Input**: 
+* **Output**: 
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