How to create a List of Sets in Kotlin - Step by Step Examples

How to create a List of Sets in Kotlin ?

Answer

In Kotlin, you can create a list of sets using the `mutableListOf` function for the outer list and the `mutableSetOf` function for the inner sets.

✐ Examples

1 Create List of Sets

In this example,

We create two inner sets named set1 and set2 using the mutableSetOf function.
We create an outer list named listOfSets using the mutableListOf function and initialize it with the inner sets.
Finally, we iterate through the list of sets and print each set to standard output.

Kotlin Program

fun main() {
    val set1 = mutableSetOf(1, 2, 3)
    val set2 = mutableSetOf('a', 'b', 'c')

    val listOfSets = mutableListOf(set1, set2)

    listOfSets.forEach { set ->
        println(set)
    }
}

Output

[1, 2, 3]
[a, b, c]

2 Create List of Sets with Empty Inner Sets

In this example,

We create an empty outer list named listOfSetsEmpty using the mutableListOf function.
We create two empty inner sets named emptySet1 and emptySet2.
We add the inner sets emptySet1 and emptySet2 to the outer list listOfSetsEmpty.
Finally, we iterate through the list of sets with empty inner sets and print each set to standard output.

Kotlin Program

fun main() {
    val emptySet1 = mutableSetOf<Int>()
    val emptySet2 = mutableSetOf<Char>()

    val listOfSetsEmpty = mutableListOf(emptySet1, emptySet2)

    listOfSetsEmpty.forEach { set ->
        println(set)
    }
}

Output

[]
[]

Summary

In this tutorial, we learned How to create a List of Sets in Kotlin language with well detailed examples.

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How to create a List of Sets in Kotlin - Step by Step Examples

How to create a List of Sets in Kotlin ?

Answer

✐ Examples

1 Create List of Sets

Kotlin Program

Output

2 Create List of Sets with Empty Inner Sets

Kotlin Program

Output

Summary

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