From fe0373797b622204d65a9a6cfc98c1522c7e7f88 Mon Sep 17 00:00:00 2001
From: sah-pinocchio <44533420+sah-pinocchio@users.noreply.github.com>
Date: Sun, 23 Jun 2019 07:53:42 +0430
Subject: [PATCH] add member function "at" (#30838)

---
 guide/english/cplusplus/vector/index.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/guide/english/cplusplus/vector/index.md b/guide/english/cplusplus/vector/index.md
index b01aff7dd3e..fe764fa5bce 100644
--- a/guide/english/cplusplus/vector/index.md
+++ b/guide/english/cplusplus/vector/index.md
@@ -127,6 +127,7 @@ std::vector.front(); // returns the first element of the vector.
 std::vector.back(); // returns the last element of the vector.
 std::vector.push_back(n); // inserts the element "n" to the end of the vector.
 std::vector.pop_back(n); // removes the last element of the vector
+std::vector.at(i); // returns a reference to the element at position i in the vector.
 std::vector.resize(n); // resizes a vector so that it contains the specified number of elements.
 std::vector.assign(i,n); // assigns new contents to the vector and replaces its current contents.
 ```