[Term Entry] Dart Queue: .elementAt()

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

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+---
+Title: '.elementAt()'
+Description: 'Returns the element at the specified index in a queue.'
+Subjects:
+  - 'Computer Science'
+  - 'Code Foundations'
+Tags:
+  - 'Dart'
+  - 'Queues'
+  - 'Methods'
+CatalogContent:
+  - 'learn-dart'
+  - 'paths/computer-science'
+---
+
+In Dart, the **`.elementAt()`** method returns the element at the specified index in a queue. This method is part of the `Queue` class under the `dart:collection` library.
+
+## Syntax
+```pseudo
+queue.elementAt(index);
+```
+
+- `queue`: The name of the queue from which an element is to be retrieved.
+- `index`: The zero-based position of the element to be retrieved.
+
+> **Note:** If the index is out of range, this method throws a `RangeError`.
+
+## Example
+
+The following example demonstrates the usage of the `.elementAt()` method:
+```dart
+import 'dart:collection';
+
+void main() {
+  Queue<int> numbers = Queue<int>();
+
+  numbers.add(10);
+  numbers.add(20);
+  numbers.add(30);
+  numbers.add(40);
+
+  print("Element at index 0: ${numbers.elementAt(0)}");
+  print("Element at index 2: ${numbers.elementAt(2)}");
+}
+```
+
+The output for the above code is as follows:
+```shell
+Element at index 0: 10
+Element at index 2: 30
+```