[Term Entry] C++ Deque: .push_back()

* Term Entry: C++ Deque Push_Back()

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Co-authored-by: Mamta Wardhani <mamta.wardhani@gmail.com>

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content/cpp/concepts/deque/terms/push-back/push-back.md

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+---
+Title: '.push_back()'
+Description: 'Adds an element to the end of the deque.'
+Subjects:
+  - 'Computer Science'
+  - 'Game Development'
+Tags:
+  - 'Containers'
+  - 'OOP'
+  - 'Classes'
+  - 'Deques'
+CatalogContent:
+  - 'learn-c-plus-plus'
+  - 'paths/computer-science'
+---
+
+In C++, the **`.push_back()`** [method](https://www.codecademy.com/resources/docs/cpp/methods) adds an element to the end of the deque.
+
+## Syntax
+
+```pseudo
+dequeName.push_back(value);
+```
+
+- `value`: The element to be added to the back of the deque. It can be of any [data type](https://www.codecademy.com/resources/docs/cpp/data-types) that the `dequeName` holds.
+
+## Example
+
+The example below showcases the use of the `.push_back()` method:
+
+```cpp
+#include <iostream>
+#include <deque>
+
+int main() {
+  // Create a deque of integers
+  std::deque<int> numbers;
+
+  // Use .push_back() to add elements to the deque
+  numbers.push_back(10);
+  numbers.push_back(20);
+  numbers.push_back(30);
+
+  // Display the elements of the deque
+  std::cout << "Deque contents: ";
+
+  for (int num : numbers) {
+    std::cout << num << " ";
+  }
+
+  std::cout << std::endl;
+
+  return 0;
+}
+```
+
+The above code generates the following output:
+
+```shell
+Deque contents: 10 20 30
+```
+
+## Codebyte Example
+
+The following codebyte adds several values to `myDeque` with the `.push_back()` method:
+
+```codebyte/cpp
+#include <iostream>
+#include <deque>
+#include <string>
+
+int main() {
+  std::deque<std::string> myDeque;
+
+  myDeque.push_back("A");
+  myDeque.push_back("B");
+  myDeque.push_back("C");
+  myDeque.push_back("D");
+
+  for (const auto& value : myDeque) {
+    std::cout << ' ' << value;
+  }
+}
+```