[Solved] Which of the following when branches correctly checks if a variable score is either 90, 95, or 100? — Ans: when(score) { 90, 95, 100 -> println("Excellent") } | Kotlin

Kotlin - Control Flow as Expressions

Which of the following when branches correctly checks if a variable score is either 90, 95, or 100?

Awhen(score) { 90 || 95 || 100 -> println("Excellent") }

Bwhen(score) { 90, 95, 100 -> println("Excellent") }

Cwhen(score) { in 90..100 -> println("Excellent") }

Dwhen(score) { 90 && 95 && 100 -> println("Excellent") }

Step-by-Step Solution

Solution:

Step 1: Identify correct syntax for multiple values in when
Kotlin uses commas to separate multiple values in a single when branch, so 90, 95, 100 is correct.
Step 2: Check other options for syntax errors or incorrect logic
Logical operators like && or || are not valid in when conditions; 'in 90..100' checks a range, not specific values.
Final Answer:
when(score) { 90, 95, 100 -> println("Excellent") } -> Option B
Quick Check:
Use commas for multiple values in when = D [OK]

Quick Trick: Use commas, not && or ||, for multiple when conditions [OK]

Common Mistakes:

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Which of the following when branches correctly checks if a variable score is either 90, 95, or 100?