Android
● ○ ○
Kotlin 2.0
Kodebits Day 76: Elvis Operator
Aug 15 2026
Practice null-safety with a short kotlin challenge.
What is the output?
fun main() {
val x: Int? = null
val y = x ?: 10
println(y * 2)
}
Try it in the online Kotlin Playground →
[spoiler title="Solution"]
Answer:
20
Explanation:
Elvis operator provides a default when the left side is null.
[/spoiler]