How to check if a Set is Not Empty in Dart

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How to check if a Set is Not Empty in Dart ?

Answer

To check if a Set is not empty in Dart, you can use the isEmpty property.

✐ Examples

1 Check if Set is Not Empty

In this example,

We declare a Set named set and initialize it with some elements.
We use the isEmpty property on the Set set to check if it contains any elements.
If the Set is not empty, the isEmpty property returns false; otherwise, it returns true.
We print the result to the standard output to indicate whether the Set is not empty or not.

Dart Program

void main() {
  Set<int> set = {1, 2, 3}; // Or Set<int> set = {} for an empty Set
  if (!set.isEmpty) {
    print('The Set is not empty');
  } else {
    print('The Set is empty');
  }
}

Output

The Set is not empty

2 Check if Empty Set is Not Empty

In this example,

We declare an empty Set named emptySet.
We use the isEmpty property on the Set emptySet to check if it contains any elements.
Since the Set is empty, the isEmpty property returns true.
We print the result to the standard output to indicate that the Set is indeed empty.

Dart Program

void main() {
  Set<int> emptySet = {};
  if (!emptySet.isEmpty) {
    print('The Set is not empty');
  } else {
    print('The Set is empty');
  }
}

Output

The Set is empty

Summary

In this tutorial, we learned How to check if a Set is Not Empty in Dart language with well detailed examples.

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How to check if a Set is Not Empty in Dart

How to check if a Set is Not Empty in Dart ?

Answer

✐ Examples

1 Check if Set is Not Empty

Dart Program

Output

2 Check if Empty Set is Not Empty

Dart Program

Output

Summary

More Dart Sets Tutorials