“Biarkan kata kunci di Kotlin” Kode Jawaban

Biarkan kata kunci di Kotlin

let takes the object it is invoked upon as the parameter and returns the result of the lambda expression.

fun main(args: Array<String>) {
    var str = "Hello World"
    str.let { println("$it!!") }
    println(str)

}
The 'it' keyword contains the copy of the property inside let. In this case "Hello world"
//This prints:
//Hello World!!
//Hello World
Ivan Drago

Biarkan kata kunci di Kotlin

let can be used to check null expressions. 

fun main(args: Array<String>) {
	var name : String? = "Kotlin let null check"
	name?.let { println(it) } //prints Kotlin let null check
	name = null
	name?.let { println(it) } //nothing happens
}

//The code inside is executed only when the property is not null.
Ivan Drago

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