[Solved] What is the output of this Kotlin code?fun doNothing(): Unit = Unit fun main() { val x = doNothing() println(x == Unit) } | Kotlin

Kotlin - Data Types

What is the output of this Kotlin code?

fun doNothing(): Unit = Unit

fun main() {
    val x = doNothing()
    println(x == Unit)
}

ACompilation error

Bfalse

CRuntime exception

Dtrue

Step-by-Step Solution

Solution:

Step 1: Understand function return and compare returned value with Unit
doNothing returns the singleton Unit object explicitly. Since x is Unit, x == Unit is true.
Final Answer:
true -> Option D
Quick Check:
Unit equality check returns true [OK]

Quick Trick: Unit is singleton, equality check returns true [OK]

Common Mistakes:

MISTAKES

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