Kotlin List dropLast()
Syntax & Examples

Syntax of List.dropLast()

The syntax of List.dropLast() extension function is:

fun <T> List<T>.dropLast(n: Int): List<T>

This dropLast() extension function of List returns a list containing all elements except last n elements.

✐ Examples

1 Example

In this example,

We create a list of integers list.
We use the dropLast function with the argument 2 to drop the last two elements from the list.
The resulting list result contains elements 1, 2, 3, 4.
Finally, we print the result list to standard output using print statement.

Kotlin Program

fun main(args: Array<String>) {
    val list = listOf(1, 2, 3, 4, 5, 6)
    val result = list.dropLast(2)
    print(result)
}

Output

[1, 2, 3, 4]

2 Example

In this example,

We create a list of characters list.
We use the dropLast function with the argument 3 to drop the last three elements from the list.
The resulting list result contains elements a.
Finally, we print the result list to standard output using print statement.

Kotlin Program

fun main(args: Array<String>) {
    val list = listOf(&quot;a&quot;, &quot;b&quot;, &quot;c&quot;, &quot;d&quot;)
    val result = list.dropLast(3)
    print(result)
}

Output

[a]

3 Example

In this example,

We create a list of strings list.
We use the dropLast function with the argument 1 to drop the last element from the list.
The resulting list result contains elements apple, banana, mango.
Finally, we print the result list to standard output using print statement.

Kotlin Program

fun main(args: Array<String>) {
    val list = listOf(&quot;apple&quot;, &quot;banana&quot;, &quot;mango&quot;, &quot;avocado&quot;)
    val result = list.dropLast(1)
    print(result)
}

Output

[apple, banana, mango]

Summary

In this Kotlin tutorial, we learned about dropLast() extension function of List: the syntax and few working examples with output and detailed explanation for each example.