Kotlin List random()
Syntax & Examples

Syntax of List.random()

There are 2 variations for the syntax of List.random() extension function. They are:

fun <T> Collection<T>.random(): T

This extension function returns a random element from this collection.

fun <T> Collection<T>.random(random: Random): T

This extension function returns a random element from this collection using the specified source of randomness.

✐ Examples

1 Example

In this example,

We create a list of integers named list containing elements 1, 2, 3, 4, 5.
We use the random() function to get a random element from the list.
The random element is stored in randomElement.
We print randomElement using println().

Kotlin Program

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

Output

2 Example

In this example,

We create a list of characters named list containing elements 'a', 'b', 'c', 'd', 'e'.
We use the random() function to get a random element from the list.
The random element is stored in randomElement.
We print randomElement using println().

Kotlin Program

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

Output

3 Example

In this example,

We create a list of strings named list containing elements "apple", "banana", "cherry", "date", "elderberry".
We use the random() function to get a random element from the list.
The random element is stored in randomElement.
We print randomElement using println().

Kotlin Program

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

Output

apple

Summary

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