Dart Set isNotEmpty
Syntax & Examples

Set.isNotEmpty property

The `isNotEmpty` property in Dart returns true if there is at least one element in the set.

Syntax of Set.isNotEmpty

The syntax of Set.isNotEmpty property is:

 bool isNotEmpty

This isNotEmpty property of Set returns true if there is at least one element in this collection.

Return Type

Set.isNotEmpty returns value of type bool.


✐ Examples

1 Non-Empty Set of Numbers

In this example,

  1. We create a Set numbers containing some numbers.
  2. We check if the set is not empty using the isNotEmpty property.
  3. We print the result to standard output.

Dart Program

void main() {
  Set<int> numbers = {1, 2, 3};
  bool result = numbers.isNotEmpty;
  print('Is the set not empty? $result');
}

Output

Is the set not empty? true

2 Empty Set of Characters

In this example,

  1. We create an empty Set characters.
  2. We check if the set is not empty using the isNotEmpty property.
  3. We print the result to standard output.

Dart Program

void main() {
  Set<String> characters = {};
  bool result = characters.isNotEmpty;
  print('Is the set not empty? $result');
}

Output

Is the set not empty? false

3 Non-Empty Set of Strings

In this example,

  1. We create a Set strings containing some strings.
  2. We check if the set is not empty using the isNotEmpty property.
  3. We print the result to standard output.

Dart Program

void main() {
  Set<String> strings = {'apple', 'banana', 'orange'};
  bool result = strings.isNotEmpty;
  print('Is the set not empty? $result');
}

Output

Is the set not empty? true

Summary

In this Dart tutorial, we learned about isNotEmpty property of Set: the syntax and few working examples with output and detailed explanation for each example.