Return multiple values from a function Kotlin

In this article, we will see different ways to return multiple values from a function in Kotlin.

Using Pair:

As a first way, we can use the Pair to return multiple values from a function. Pair accepts two parameters which are the values that we want to store.

Following is the example:

fun calculate(): Pair<Int, String> {
    // Perform calculations
    val resultValue1 = 42
    val resultValue2 = "Hello, World!"
    
    return Pair(resultValue1, resultValue2)
}

fun main() {
    val (value1, value2) = calculate()
    println("Value 1: $value1")
    println("Value 2: $value2")
}

Using Triple:

If you have a requirement of returning three values then you can use the Triple to return three values from a function.

This function takes three parameters which are the values that we want to store or return to the caller.

fun calculate(): Triple<Int, String, Boolean> {
    val resultValue1 = 42
    val resultValue2 = "Hello, World!"
    val resultValue3 = true
    
    return Triple(resultValue1, resultValue2, resultValue3)
}

fun main() {
    val (value1, value2, value3) = calculate()
    println("Value 1: $value1")
    println("Value 2: $value2")
    println("Value 3: $value3")
}

Note: If you have any custom requirement where you want to return more than three values from a function, then you can use the List type or you can write your own custom Data class.