Kotlin - function, expression syntax

 

 

class KotlinPlayGroundActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_kotlin_play_ground)

        println("calculate : ${calculate(3, 4)}")
        println("calculate2 : ${calculate2(5, 10)}")
        println("calculate3 : ${calculate3(20, 41)}")

    }

    fun calculate(a: Int, b: Int): Int {
        return a + b
    }

    fun calculate2(a: Int, b: Int): Int = a + b

    fun calculate3(a: Int, b: Int) = a + b

}