[Solved] You want to write a Kotlin when expression that returns:- "Small Int" if the value is an Int between 1 and 10 inclusive,- "Large Int" if the value is an Int greater than 10,- "String" if the value is... | Kotlin

Kotlin - Control Flow as Expressions

You want to write a Kotlin when expression that returns:
- "Small Int" if the value is an Int between 1 and 10 inclusive,
- "Large Int" if the value is an Int greater than 10,
- "String" if the value is a String,
- "Other" for anything else.

Which of the following when expressions correctly implements this?

Awhen (v) { in 1..10 -> "Small Int" is Int -> "Large Int" is String -> "String" else -> "Other" }

Bwhen (v) { is Int -> if (v in 1..10) "Small Int" else "Large Int" is String -> "String" else -> "Other" }

Cwhen (v) { is Int in 1..10 -> "Small Int" is Int -> "Large Int" is String -> "String" else -> "Other" }

Dwhen (v) { is Int && v in 1..10 -> "Small Int" is Int -> "Large Int" is String -> "String" else -> "Other" }

Step-by-Step Solution

Solution:

Step 1: Understand the conditions needed
We need to check if v is an Int and then check its value range for "Small Int" or "Large Int". Also check if v is a String.
Step 2: Analyze each option's correctness
when (v) { in 1..10 -> "Small Int" is Int -> "Large Int" is String -> "String" else -> "Other" } incorrectly uses in 1..10 without checking type first, causing errors if v is not Int. when (v) { is Int in 1..10 -> "Small Int" is Int -> "Large Int" is String -> "String" else -> "Other" } uses invalid syntax is Int in 1..10. when (v) { is Int && v in 1..10 -> "Small Int" is Int -> "Large Int" is String -> "String" else -> "Other" } uses invalid syntax is Int && v in 1..10 inside when. when (v) { is Int -> if (v in 1..10) "Small Int" else "Large Int" is String -> "String" else -> "Other" } correctly checks type first, then uses an if inside the branch to distinguish ranges.
Final Answer:
Option B correctly implements the logic. -> Option B
Quick Check:
Use nested if inside when for complex conditions [OK]

Quick Trick: Check type first, then range inside branch with if [OK]

Common Mistakes:

MISTAKES

Using invalid syntax combining is and in
Not checking type before range
Trying to use logical operators directly in when cases

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You want to write a Kotlin when expression that returns:

Step 1: Understand the conditions needed

Step 2: Analyze each option's correctness

Final Answer:

Quick Check:

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