# 
## Overview

The **`clear`** method removes all the elements present in the `HashSet` object.

## Syntax

```kotlin
fun clear()
```

## Parameters

This method doesn’t take any arguments.

## Return value
This method doesn’t return any value.

## Code
The code below demonstrates the use of the `clear` method to remove all elements present in the `HashSet`:

fun main() {
  //create a new HashSet which can have integer type as elements
  var set: HashSet<Int> = hashSetOf<Int>()

  // add four entries
  set.add(1)
  set.add(2)
  set.add(3)
  set.add(4)
  
  println("\nThe set is : $set")
  
  set.clear();

  println("\n After calling clear method The set is : $set")

}


## Explanation

* Line 3: We create a new `HashSet` object named `set`. We use the `hashSetOf()` method to create an empty `HashSet`.

* Lines 6–9: We add four new elements (1,2,3,4) to the `set` using the `add()` method.

* Line 13: We use the `clear` method to remove all the elements present in the `set`. The `set` becomes empty after calling the `clear` method.

How to use the HashSet.clear method in Kotlin

The `clear` method in Kotlin's `HashSet` removes all elements from the set, leaving it empty.