The **```kotlin.collections``` package** is part of Kotlin's standard library, and it contains all collection types, such as ```Map```, ```List```, ```Set```, etc.
The package provides the **```ArrayList``` class** which is a mutable list and uses a dynamic resizable array as the backing storage.

#    
## The `clear()` method
The `ArrayList` class contains the **`clear()` method** which removes all the elements from the list.

## Syntax
```
fun clear()
```

## Arguments 
- This method does not take any arguments.

## Return value
- It does not return any values.

## Things to note
- `ArrayList` follows the sequence of insertion of elements.

- It is allowed to contain duplicate elements.

The illustration below shows the function of the `clear()` method.

## Code
The ```ArrayList``` class is present in the ```kotlin.collection``` package and is imported by default in every Kotlin program.

fun main(args : Array<String>) {
    val fruitList = ArrayList<String>()
    
    fruitList.add("Apple")
    fruitList.add("Mango")  
    fruitList.add("Grapes")  
    fruitList.add("Orange")  
    
    println("Printing ArrayList elements--")  
    println(fruitList)  

    fruitList.clear();

    println("Printing ArrayList elements after calling clear()--")  
    println(fruitList)  
}

## Explanation
- First, we create an empty ```ArrayList``` to store the strings.

- Next, we add a few fruits to the ```ArrayList``` object, using the ```add()``` method such as: ```"Apple"```, ```"Mango"```, ```"Grapes"```, and  ```"Orange"```.
- Next, we call the  ```clear()``` method and it removes all the elements from the `Arraylist`.
- The `Arraylist` elements are displayed before and after calling the ```clear()``` method by using the ```print()``` function of the ```kotlin.io``` package. The list is emptied after calling the ```clear()``` method.



What is the ArrayList.clear() method in Kotlin?

The clear() method

Syntax

Arguments

Return value

Things to note

Code

Explanation

The `clear()` method