Which of the following is the correct way to declare a function that returns Unit explicitly in Kotlin?

easy📝 Syntax Q12 of 15

Kotlin - Data Types

Which of the following is the correct way to declare a function that returns Unit explicitly in Kotlin?

Afun greet(): Unit { println("Hello") }

Bfun greet() -> Unit { println("Hello") }

Cfun greet(): void { println("Hello") }

Dfun greet() { return Unit }

Step-by-Step Solution

Solution:

Step 1: Check Kotlin function syntax for return type
Kotlin uses a colon : before the return type, so fun greet(): Unit is correct.
Step 2: Validate each option
fun greet() -> Unit { println("Hello") } uses an arrow -> which is invalid syntax. fun greet(): void { println("Hello") } uses void which is not a Kotlin type. fun greet() { return Unit } tries to return Unit explicitly but misses the return type declaration.
Final Answer:
fun greet(): Unit { println("Hello") } -> Option A
Quick Check:
Return type declared with colon and Unit [OK]

Quick Trick: Use colon before Unit, not arrow or void [OK]

Common Mistakes:

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