Iterate over a set in Kotlin

This article explores different ways to iterate over a set in Kotlin.

1. Using `forEach()` function

In Kotlin, you can easily loop over a set with the help of the forEach() function, as shown below:

fun main() {

val set: Set<Int> = setOf(1, 2, 3, 4, 5)

set.forEach { println(it) }

}

Alternatively, you can use a for-loop or foreach loop to loop through Set.

fun main() {

val set: Set<Int> = setOf(1, 2, 3, 4, 5)

for (item in set) {

println(item)

}

You can also call the iterator() that returns an iterator over a set, as shown below:

fun main() {

val set: Set<Int> = setOf(1, 2, 3, 4, 5)

val it = set.iterator()

while (it.hasNext()) {

println(it.next())

}

Or replace the while loop with forEachRemaining() function.

fun main() {

val set: Set<Int> = setOf(1, 2, 3, 4, 5)

set.iterator().forEachRemaining { println(it) }

}

If you only need to display contents of the Set, you can simply print the string representation of Set, as shown below:

fun main() {

val set: Set<Int> = setOf(1, 2, 3, 4, 5)

// Print string representation of the set

println(set)

}

That’s all about iterating over a set in Kotlin.