created new entry for pop_front() under deque.

content/cpp/concepts/deque/terms/pop-front/pop-front.md

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+---
+Title: 'pop_front()'
+Description: 'Removes the first element from a deque container in C++.'
+Subjects:
+  - 'Computer Science'
+  - 'Game Development'
+Tags:
+  - 'Containers'
+  - 'Deques'
+  - 'Methods'
+  - 'STL'
+CatalogContent:
+  - 'learn-c-plus-plus'
+  - 'paths/computer-science'
+---
+
+The **`pop_front()`** method in C++ deque removes or pops the first (front) element from the deque, reducing its size by one.
+
+## Syntax
+
+```pseudo
+deque_name.pop_front();
+```
+
+**Parameters:**
+
+This method does not take any parameters.
+
+**Return value:**
+
+`pop_front()` does not return anything and removes the first element from the deque
+
+## Example
+
+In this example, the first element of an integer deque is removed, and the updated deque is printed:
+
+```cpp
+#include <iostream>
+#include <deque>
+using namespace std;
+
+int main() {
+  deque<int> numbers = {10, 20, 30, 40};
+
+  // Remove the first element
+  numbers.pop_front(); // Removes 10
+
+  cout << "Deque after pop_front(): ";
+  for (int num : numbers) {
+    cout << num << " ";
+  }
+
+  return 0;
+}
+```
+
+The output of this code is:
+
+```shell
+Deque after pop_front(): 20 30 40
+```
+
+## Codebyte Example
+
+In this example, the first element of a string deque is removed, and the new front element is displayed:
+
+```codebyte/cpp
+#include <iostream>
+#include <deque>
+using namespace std;
+
+int main() {
+  deque<string> names = {"Alice", "Bob", "Charlie"};
+
+  // Removes the first element
+  names.pop_front(); // Removes "Alice"
+
+  cout << "Front element after pop_front(): " << names.front() << endl;
+  return 0;
+}
+```