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What does "return@" mean in Kotlin?
return@ is a statement in Kotlin which helps the developers to return a function to the called function. In simple words, return@ can return any value, anonymous function, simple inline function, or a lambda function.
Example – return in Kotlin
fun main(args: Array<String>) {
val s = message()
println("Message = $s")
}
fun message():String{
return "Hello Kotlin! This is a returned message."
}Output
It will produce the following output −
Message = Hello Kotlin! This is a returned message.
Example – Kotlin Labeled return
Now "return@" helps to control the flow to a specific level inside the code. In Kotlin terminology, it is known as "Labeled return" often it is denoted using return@label. Let's take an example to demonstrate how it works.
fun ArraySum(intArray: List<Int>) {
intArray.forEach {
// return to the forEach block
// whenever the condition is met
if (it == 30) return@forEach
print(it)
}
print("---Control skipped for the value of 30")
}
fun main(args: Array<String>) {
ArraySum(listOf(1,2,3,4,5,6,30,40))
}Output
It will generate the following output −
12345640---Control skipped for the value of 30
Updated on: 16-Mar-2022
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