Kotlin List plusElement()
Syntax & Examples

Syntax of List.plusElement()

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

fun <T> Iterable<T>.plusElement(element: T): List<T>

This plusElement() extension function of List returns a list containing all elements of the original collection and then the given element.


✐ Examples

1 Example

In this example,

  • We create a list of integers named list containing elements 1, 2, 3, 4, 5.
  • We use the plusElement() function to add the element 6 to the list.
  • The resulting list newList contains all elements of the original list plus the added element 6.
  • We print newList using println().

Kotlin Program

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

Output

[1, 2, 3, 4, 5, 6]

2 Example

In this example,

  • We create a list of characters named list containing elements 'a', 'b', 'c'.
  • We use the plusElement() function to add the character 'd' to the list.
  • The resulting list newList contains all elements of the original list plus the added character 'd'.
  • We print newList using println().

Kotlin Program

fun main(args: Array<String>) {
    val list = listOf('a', 'b', 'c')
    val newList = list.plusElement('d')
    println(newList)
}

Output

[a, b, c, d]

3 Example

In this example,

  • We create a list of strings named list containing elements "apple", "banana", "cherry".
  • We use the plusElement() function to add the string "date" to the list.
  • The resulting list newList contains all elements of the original list plus the added string "date".
  • We print newList using println().

Kotlin Program

fun main(args: Array<String>) {
    val list = listOf("apple", "banana", "cherry")
    val newList = list.plusElement("date")
    println(newList)
}

Output

[apple, banana, cherry, date]

Summary

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