How to Initialize a List in Kotlin - Step by Step Examples

How to Initialize a List in Kotlin ?

To initialize a list in Kotlin, you can use the listOf function for a read-only list or the mutableListOf function for a mutable list.

In this example,

We use the listOf function to create a read-only list of integers and assign it to the variable readOnlyList.
The listOf function takes the elements as arguments and returns a list containing those elements.
We print the list to standard output to verify its contents.

fun main() {
    val readOnlyList = listOf(1, 2, 3, 4, 5)
    println("Read-Only List: $readOnlyList")
}

Read-Only List: [1, 2, 3, 4, 5]

In this example,

We use the mutableListOf function to create a mutable list of strings and assign it to the variable mutableList.
The mutableListOf function takes the elements as arguments and returns a list containing those elements.
We add a new element to the list using the add method.
We print the list to standard output to verify its contents.

fun main() {
    val mutableList = mutableListOf("Apple", "Banana", "Cherry")
    mutableList.add("Date")
    println("Mutable List: $mutableList")
}

Mutable List: [Apple, Banana, Cherry, Date]

In this tutorial, we learned How to Initialize a List in Kotlin language with well detailed examples.