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How to implement switch-case statement in Kotlin?
Switch case statement in any programming language is a type of selection control mechanism that allows the developers to test the value of a variable or expression and change the control flow of a program based on the outcome of the comparison. It also provides an option to do something whenever the value of the variable does not match a given value.
Kotlin does not provide an option to write a switch-case statement; however we can implement the switch-case functionality in Kotlin using the when() function which works exactly the same way switch works in other programming languages.
In this article, we will take a simple example and demonstrate how we can implement the switch-case functionality Kotlin.
Example – Implementing Switch-Case using when()
In this example, we will generate a random value and we will be using when() to do different operations on the variable.
fun main(args: Array<String>) { // generating a random value between 0 to 10 var randomVal=(0..10).random() println("Current value: " + randomVal) when (randomVal) { 1 -> print("randomVal == 1") 2 -> print("randomVal == 2") 3 -> print("randomVal == 3") 4 -> print("randomVal == 4") 5 -> print("randomVal == 5") 6 -> print("randomVal == 6") 7 -> print("randomVal == 7") 8 -> print("randomVal == 8") 9 -> print("randomVal == 9") 10 -> print("randomVal == 10") else -> { print("x is neither 1 nor 2") } } }
Output
The output may vary based on the random value generated.
Current value: 10 randomVal == 10