Dart Queue: .last

content/dart/concepts/queue/terms/last/last.md

@@ -0,0 +1,61 @@
+---
+Title: '.last'
+Description: 'Returns the last element in a queue without removing it.'
+Subjects:
+  - 'Computer Science'
+  - 'Developer Tools'
+Tags:
+  - 'Collections'
+  - 'Dart'
+  - 'Queues'
+CatalogContent:
+  - 'learn-dart'
+  - 'paths/computer-science'
+---
+
+In Dart, the **`.last`** property returns the last element in a `Queue` without modifying the queue. It provides read-only access to the element at the end of the queue.
+
+This property is part of the `Queue` class from the `dart:collection` library and is commonly used when you need to inspect the most recently added element or the final element in the queue.
+
+## Syntax
+
+```pseudo
+collection.last
+```
+
+**Parameters:**
+
+This property does not take any parameters.
+
+**Return value:**
+
+Returns the last element in the queue.
+
+> **Note:** If the queue is empty, accessing `.last` throws a `StateError`.
+
+## Example: Accessing the Last Element of a Queue
+
+This example demonstrates how to retrieve the last element from a queue without removing it:
+
+```dart
+import 'dart:collection';
+
+void main() {
+  Queue<int> numbers = Queue<int>();
+
+  numbers.add(10);
+  numbers.add(20);
+  numbers.add(30);
+  numbers.add(40);
+
+  print('Last element: ${numbers.last}');
+}
+```
+
+It will produce the following output:
+
+```shell
+Last element: 40
+```
+
+The queue remains unchanged after accessing `.last`, making it useful for inspection or conditional logic without altering the data structure.