Which of the following Kotlin snippets correctly uses when as an expression to assign a value to val result?

easy📝 Conceptual Q2 of 15

Kotlin - Control Flow as Expressions

Which of the following Kotlin snippets correctly uses when as an expression to assign a value to val result?

Aval result = when { num == 1 -> "One" num == 2 -> "Two" }

Bval result = when (num) { 1 -> "One"; 2 -> "Two"; else -> "Other" }

Cval result = when (num) { 1 -> "One" 2 -> "Two" }

Dval result = when (num) { 1 -> "One"; 2 -> "Two" } else "Other"

Step-by-Step Solution

Solution:

Step 1: Check syntax for when expression
Each branch should be separated by commas or new lines, and an else branch is required if not all cases are covered.
Step 2: Validate options
val result = when (num) { 1 -> "One"; 2 -> "Two"; else -> "Other" } uses correct syntax with else and proper arrow notation.
Final Answer:
val result = when (num) { 1 -> "One"; 2 -> "Two"; else -> "Other" } is syntactically correct.
Quick Check:
Look for else and proper arrow usage [OK]

Quick Trick: Use arrows and else branch for complete when expression [OK]

Common Mistakes:

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