Which of the following is the correct syntax to check if a variable day is either "Mon", "Tue", or "Wed" using when?

easy📝 Syntax Q3 of 15

Kotlin - Control Flow as Expressions

Which of the following is the correct syntax to check if a variable day is either "Mon", "Tue", or "Wed" using when?

Awhen(day) { "Mon", "Tue", "Wed" -> println("Start of week") }

Bwhen(day) { "Mon" || "Tue" || "Wed" -> println("Start of week") }

Cwhen(day) { listOf("Mon", "Tue", "Wed") -> println("Start of week") }

Dwhen(day) { "Mon" && "Tue" && "Wed" -> println("Start of week") }

Step-by-Step Solution

Solution:

Step 1: Recall correct syntax for multiple conditions in when
Multiple values are separated by commas inside the when branch.
Step 2: Evaluate other options for syntax correctness
Logical operators like || or && are invalid; listOf("Mon", "Tue", "Wed") checks if day equals the list object, not membership.
Final Answer:
when(day) { "Mon", "Tue", "Wed" -> println("Start of week") } -> Option A
Quick Check:
Use commas for multiple string conditions in when = B [OK]

Quick Trick: Separate multiple string conditions with commas in when [OK]

Common Mistakes:

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