[Solved] Which of the following is the correct syntax for a when expression returning a value in Kotlin? — Ans: val output = when(x) { 1 -> "One"; 2 -> "Two"; else -> "Other" } | Kotlin

Kotlin - Control Flow as Expressions

Which of the following is the correct syntax for a when expression returning a value in Kotlin?

Aval output = when(x) { 1 -> "One"; 2 -> "Two"; else -> "Other" }

Bval output = when x { 1 -> "One"; 2 -> "Two"; else -> "Other" }

Cval output = when(x) { 1 : "One"; 2 : "Two"; else : "Other" }

Dval output = when { x == 1 -> "One", x == 2 -> "Two", else -> "Other" }

Step-by-Step Solution

Solution:

Step 1: Understand when with argument syntax
val output = when(x) { 1 -> "One", 2 -> "Two", else -> "Other" } correctly uses when with argument and arrows.
Step 2: Identify syntax errors in other options
val output = when x { 1 -> "One"; 2 -> "Two"; else -> "Other" } misses parentheses; val output = when(x) { 1 : "One"; 2 : "Two"; else : "Other" } uses colons instead of arrows; val output = when { x == 1 -> "One", x == 2 -> "Two", else -> "Other" } uses when without argument.
Final Answer:
val output = when(x) { 1 -> "One"; 2 -> "Two"; else -> "Other" } -> Option A
Quick Check:
Correct when syntax uses parentheses and arrows [OK]

Quick Trick: Use arrows (->) and parentheses correctly in when with argument [OK]

Common Mistakes:

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Which of the following is the correct syntax for a when expression returning a value in Kotlin?