Kotlin List toList()
Syntax & Examples

Syntax of toList()

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

fun <T> Iterable<T>.toList(): List<T>

This toList() extension function of List returns a List containing all elements.

✐ Examples

1 Example

In this example,

We create a set named set1 containing the characters 'a', 'p', 'p', 'l', 'e'.
We convert set1 to a List using the toList() function.
The resulting List, which contains all elements from the set, is stored in list1.
Finally, we print list1 to standard output.

Kotlin Program

fun main(args: Array<String>) {
    val set1 = setOf(&quot;a&quot;, &quot;p&quot;, &quot;p&quot;, &quot;l&quot;, &quot;e&quot;);
    val list1 = set1.toList();
    println(list1);
}

Output

[a, p, l, e]

2 Example

In this example,

We create an array named array containing integers 10, 20, 30.
We convert array to a List using the toList() function.
The resulting List, which contains all elements from the array, is stored in list2.
Finally, we print list2 to standard output.

Kotlin Program

fun main(args: Array<String>) {
    val array = arrayOf(10, 20, 30);
    val list2 = array.toList();
    println(list2);
}

Output

[10, 20, 30]

3 Example

In this example,

We create a string named string containing the characters 'example'.
We convert string to a List using the toList() function.
The resulting List, which contains all characters from the string, is stored in list3.
Finally, we print list3 to standard output.

Kotlin Program

fun main(args: Array<String>) {
    val string = &quot;example&quot;;
    val list3 = string.toList();
    println(list3);
}

Output

[e, x, a, m, p, l, e]

Summary

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