Kotlin List minOf()
Syntax & Examples

Syntax of List.minOf()

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

fun <T> Iterable<T>.minOf(selector: (T) -> Double): Double

This minOf() extension function of List returns the smallest value among all values produced by selector function applied to each element in the collection.


✐ Examples

1 Example

In this example,

  • We create a list of doubles named list containing elements 3.5, 1.2, 7.8, 4.3, 5.1.
  • We use the minOf() function with a selector that returns the elements themselves.
  • The minimum value in the list, min, is printed to standard output using println statement.

Kotlin Program

fun main(args: Array<String>) {
    val list = listOf(3.5, 1.2, 7.8, 4.3, 5.1)
    val min = list.minOf { it }
    println("Minimum value: \$min")
}

Output

Minimum value: 1.2

2 Example

In this example,

  • We create a list of characters named list containing elements 'a', 'b', 'c'.
  • We use the minOf() function with a selector that converts characters to integers.
  • The minimum value in the list, min, is printed to standard output using println statement.

Kotlin Program

fun main(args: Array<String>) {
    val list = listOf('a', 'b', 'c')
    val min = list.minOf { it.toInt() }
    println("Minimum value: \$min")
}

Output

Minimum value: 97

3 Example

In this example,

  • We create a list of strings named list containing elements "apple", "banana", "cherry".
  • We use the minOf() function with a selector that returns the length of each string.
  • The minimum value in the list, min, is printed to standard output using println statement.

Kotlin Program

fun main(args: Array<String>) {
    val list = listOf("apple", "banana", "cherry")
    val min = list.minOf { it.length }
    println("Minimum value: \$min")
}

Output

Minimum value: 5

Summary

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