The queue.isNotEmpty function in Dart is used to check if a queue is empty. queue.isNotEmpty returns true if the queue is not empty. Otherwise, it returns false.
The image below shows the visual representation of the queue.isNotEmpty function.
The
dart:collectionmodule is required in order to use thequeue.isNotEmptyfunction.
bool queue.isNotEmpty
queueis the name of the queue.
The queue.isNotEmpty function does not require any parameters.
If the queue is not empty, the queue.isNotEmpty function returns true. Otherwise, it returns false.
The following code shows how to use the queue.isNotEmpty function in Dart.
import 'dart:convert';import 'dart:collection';void main() {Queue<int> queue_1 = new Queue<int>();queue_1.add(1);queue_1.add(3);queue_1.add(5);queue_1.add(2);queue_1.add(0);//Queue filled= 1->3->5->2->0print("queue_1 is not empty: ${queue_1.isNotEmpty}");//Queue emptyQueue<int> queue_2 = new Queue<int>();print("queue_2 is not empty: ${queue_2.isNotEmpty}");}