# 
#  Overview

We can use the **`last`** property to get the last element present in a `SplayTreeSet`.

If the `set` is empty, a `StateError` is thrown.

##   
## Syntax


#    
## Return value

This method returns the last element present in the `set`.

## Code
The code below demonstrates how to get the last element of the `SplayTreeSet`:

import 'dart:collection';
void main() {
  //create a new SplayTreeSet which can have int type elements
  SplayTreeSet set = new SplayTreeSet<int>((a,b) =>  b.compareTo(a));

  // add three elements to the set
  set.add(5);
  set.add(4);
  set.add(3);
  print('The set is $set');

  print('The last element of set is ${set.last}');

  // delete all elements of the set
  set.clear();
  try { 
    // if set contains no elements, accessing last will result in error
    print(set.last); 
  } catch(e) { 
      print(e);
  } 
}

## Explanation

In the code above,

* **Line 1**: We import the `collection` library.
* **Line 4**: We create a new `SplayTreeSet` object with the name `set`. We then pass a `compare` function as an argument. This function will be used to maintain the order of the `set` elements. In our case, our `compare` function will order elements in descending order.

* **Lines 7-9**: We add three new elements to the `set`. Now the set is `{5,4,3}`.
* **Line 12**: We get the last element of the `set` using the `last` property.
* **Line 15**: We remove all elements of the set using the `clear` method.
* **Line 18**: We try to access the `last` property of the empty `set`. This throws a `StateError` saying that no element is present in the `set`.




















How to get the last element of the SplayTreeSet in Dart

Use the `last` property to get the last element in a `SplayTreeSet` in Dart; throws `StateError` if empty.