[ISSUE 7631] Queue Back entry writed and checked locally

content/cpp/concepts/queues/terms/back/back.md

@@ -0,0 +1,117 @@
+---
+Title: '.back()'
+Description: 'Returns a reference to the element at the back of the queue.' 
+Subjects:
+  - 'Computer Science'
+  - 'Game Development'
+Tags:
+  - 'Classes'
+  - 'Methods'
+  - 'Objects'
+  - 'OOP'
+CatalogContent:
+  - 'learn-c-plus-plus'
+  - 'paths/computer-science'
+---
+
+The C++ **`.back()`** [method](https://www.codecademy.com/resources/docs/cpp/methods) is used to access the element at the back of the queue without removing it.
+
+## C++ `.back()` Syntax
+
+```pseudo
+queueName.back();
+```
+
+**Parameters:**
+
+The C++ `.back()` method takes no parameters.
+
+**Return value:**
+
+Returns a reference to the element at the end of the queue.
+
+## Example 1: Basic usage of C++ `.back()`
+
+This example uses C++ `.back()` to access the last element of the queue:
+
+```cpp
+#include <iostream>
+#include <queue>
+using namespace std;
+
+int main() {
+  // Declaring a queue
+  queue<int> q;
+
+  // Inserting int elements into the queue
+  q.push(10);
+  q.push(20);
+  q.push(30);
+
+  // Print the last element of the queue
+  cout <<"Last element: " << q.back() << endl;
+}
+```
+
+Here is the output of this code:
+
+```shell
+Last element: 30
+```
+
+## Example 2: Using C++ `.back()` with `.push()`
+
+This example uses C++ `.back()` to return the last element of the queue after we used `.push()`:
+
+```cpp
+#include <iostream>
+#include <queue>
+using namespace std;
+
+int main () {
+  queue<string> q;
+
+  q.push("Jhon");
+  q.push("Bob");
+  q.push("Doe");
+
+  cout <<"Last element: " << q.back() << endl;
+  q.push("Alice");
+  cout <<"Last element after push: " << q.back() << endl;
+}
+```
+
+Here is the output of this code:
+
+```shell
+Last element: Doe
+Last element after push: Alice
+```
+
+## Codebyte Example: Modifying the Last Element Using C++ `.back()`
+
+This codebyte example uses C++ `.back()` to modify the last element of the queue:
+
+```codebyte/cpp
+#include <iostream>
+#include <queue>
+using namespace std;
+
+int main() {
+  queue<int> q;
+
+  q.push(10);
+  q.push(20);
+
+  // Print the last element
+  cout << "Last element before modification: " << q.back() << endl;
+
+  // Modify the last element
+  q.back() = 100;
+
+  // Print the modified last element
+  cout << "Last element after modification: " << q.back() << endl;
+
+  return 0;
+}
+```