Add an Item to a List in Kotlin

A List is a collection where you can store same type of data in one place. There are two types of lists in Kotlin −

• An Immutable list is something that cannot be modified. It is read-only in nature.

• The other type of list is mutable which can be modified.

In this article, we will see how to create a mutable list and how to add an item to the existing list.

Example – Adding an Item to a Mutable List

In order to add an item to a list, we will be using add() that is provided by the Kotlin library class.

fun main(args: Array<String>) {

   var str = arrayListOf("orange", "apple")
   println("The original list: " + str)

   str.add("mango")
   str.add("berry")

println("The modified list: " + str)
}

Output

On execution, it will yield the following output −

The original list: [orange, apple]
The modified list: [orange, apple, mango, berry]