Functional Kotlin

Function as property

Kotlin also allows us to have functions as properties. Functions as properties means that a function can be used as a property.

For instance, take the following example:

fun main(args: Array<String>) { 
    val sum = { x: Int, y: Int -> x + y }  
    println("Sum ${sum(10,13)}") 
    println("Sum ${sum(50,68)}") 
} 

In the preceding program, we created a property, sum, which will actually hold a function to add two numbers passed to it.

While sum is a val property, what it holds is a function (or lambda) and we can call that function just like the usual function we call; there are no differences there at all.

If you're curious, the following is the output:

Now, let us discuss the syntax of lambda.

In Kotlin, a lambda always stays embraced ...