Part 20 – Vararg & Spread Operator

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In part 20 of the Kotlin beginner tutorial, we will learn how to use vararg parameters to pass a variable number of arguments to a function, and how we can pass an array to a vararg parameter using the spread operator.

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KotlinTutorial.kt

fun main() {
    val array = intArrayOf(1, 2, 3, 4, 5, 6)

    println(getSum(10, 20, *array, 30, b = 40))
}

fun getSum(a: Int, vararg numbers: Int, b: Int): Int {
    var sum = a + b

    for (number in numbers) sum += number

    return sum
}