kotlin_coroutine_example.kt

import kotlinx.coroutines.*
import kotlin.system.*
fun main() = runBlocking {
    val executionTime = measureTimeMillis {
        val asyncTask1 = async{addTen(1)}
        val asyncTask2 = async{addTen(2)}
        println("task 1: ${asyncTask1.await()}")
        println("task 2: ${asyncTask2.await()}")
    }
    println("execution time: [$executionTime] ms")
}
suspend fun addTen(n: Int): Int {
    delay(1000) 
    return n + 10
}