BeginnerControl Flow

When Expression

Pattern matching with when.

kotlin
fun main() {
    val day = 3
    val dayName = when (day) {
        1 -> "Monday"
        2 -> "Tuesday"
        3 -> "Wednesday"
        4 -> "Thursday"
        5 -> "Friday"
        else -> "Weekend"
    }
    println(dayName)
}
Output
Wednesday

Explanation

when matches the value and returns the corresponding result. else is the default case.

Related Tutorials

kotlin when