There is no

? :

in kotlin

In Kotlin, you don’t need ternary. You can easily write this:

val str = if (exp) "true" else "false"

However, you can’t write this in Java like that so that’s the reason of ternary has born.

String str = exp ? "true" : "false"

Also ? : Is Elvis operator in kotlin it is use when you want to assign alternate value when the actual value is null example val str= exp?:"not_found" .. so if exp is a null then not_found till be assigned to the str variable.