Each element of a list has an index. Kotlin list indexes start from zero. The last element has len-1 index.

Kotlin List Indexing Example

The example presents Kotlin List indexing operations.

fun main() {

    val words = listOf("pen", "cup", "dog", "person",
            "cement", "coal", "spectacles", "cup", "bread")

    val w1 = words.get(0)
    println(w1)

    val w2 = words[0]
    println(w2)

    val i1 = words.indexOf("cup")
    println("The first index of cup is $i1")

    val i2 = words.lastIndexOf("cup")
    println("The last index of cup is $i2")

    val i3 = words.lastIndex
    println("The last index of the list is $i3")
}

Output:

pen
pen
The first index of cup is 1
The last index of cup is 7
The last index of the list is 8
This is the output.