suspend

A functional type builder that ensures the given block has a suspend modifier and can be used as a suspend function.

inline fun <R> suspend(noinline block: suspend () -> R): suspend () -> R(source)

import kotlinx.coroutines.*

fun main() = runBlocking {
    // Create a suspend function using the `suspend` builder
    val loadData: suspend () -> String = suspend {
        delay(1000)          // Simulate some async work
        "Data loaded!"
    }

    // Invoke the suspend function inside a coroutine
    println(loadData())     // Prints: Data loaded!
}

Source