The **`set.isNotEmpty` function** in Dart is used to check if a set is empty or not. `set.isNotEmpty` returns `true` if a set is not empty; otherwise, it returns `false`. 

The image below shows the visual representation of the `set.isNotEmpty` function.


---
>In Dart, a **`set`** is a particular instance of a list in which all of the inputs are unique.

> `dart:core` is required in order to use this function.
---

# 
## Syntax
```dart
set_name.isNotEmpty
```

>  `set_name` is the name of the set.
## Parameter
The `set.isNotEmpty` function does not require any parameters.

## Return value

If the set is not empty, the `set.isNotEmpty` function returns `true`; otherwise, it returns `false`.
>If there are duplicates, then the set will only keep the first instance. For instance,
`{'Tom','Alsvin','Eddie','Tom'}` will result in `{'Tom','Alsvin','Eddie'}`.

## Code
The code below shows how to use the `set.isNotEmpty` function in Dart.


import 'dart:convert';
import 'dart:core';
void main() {
  Set<String> set_1 = {'Tom','Alsvin','Eddie'}; 
  //set containing unique value
  print("set_1 is not empty: ${set_1.isNotEmpty}");

  //empty set
  Set<String> set_2 = {};
  print("set_2 is not empty: ${set_2.isNotEmpty}");

  //set containing non-unique value
  Set<String> set_3 = {'Tom','Alsvin','Eddie','Tom'}; 
  print("set_3 is not empty: ${set_3.isNotEmpty}");
}

What is the Set.isNotEmpty method in Dart?

set.isNotEmpty in Dart checks if a set has elements, returning true when non-empty, and false otherwise.