HackerRank - Simple Array Sum

SimpleArraySum.kt

// https://www.hackerrank.com/challenges/simple-array-sum/problem

import java.io.*
import java.math.*
import java.security.*
import java.text.*
import java.util.*
import java.util.concurrent.*
import java.util.function.*
import java.util.regex.*
import java.util.stream.*
import kotlin.collections.*
import kotlin.comparisons.*
import kotlin.io.*
import kotlin.jvm.*
import kotlin.jvm.functions.*
import kotlin.jvm.internal.*
import kotlin.ranges.*
import kotlin.sequences.*
import kotlin.text.*

/*
 * Complete the 'simpleArraySum' function below.
 *
 * The function is expected to return an INTEGER.
 * The function accepts INTEGER_ARRAY ar as parameter.
 */

fun simpleArraySum(ar: Array<Int>): Int {
    var sum = 0
    ar.forEach { sum += it } 
    return sum
}

fun main(args: Array<String>) {
    val arCount = readLine()!!.trim().toInt()

    val ar = readLine()!!.trimEnd().split(" ").map{ it.toInt() }.toTypedArray()

    val result = simpleArraySum(ar)

    println(result)
}