The async() function ​

👉 Check runBlocking code first

fun main() {
	runBlocking {
		val num1 = async { getValue() }
		val num2 = async { getValue() }
		println("result of num1 + num2 is ${num1.await() + num2.await()}")
	}
}

Output ​

entering getValue() at 22:52:25.025
entering getValue() at 22:52:25.03
leaving getValue() at 22:52:28.03
leaving getValue() at 22:52:28.032
result of num1 + num2 is 0.8416379026501276

The two calls to getValue() are independent and don't necessarily need the coroutine to suspend. Kotlin has an async function that's similar to launch.

The async() function returns a value of type Deferred.

The lambda passed to async() is a suspend function.