[Solved] Identify the error in this Kotlin code snippet:val list: List = listOf(1, 2, null, 4) — Ans: The list cannot contain null because Int is non-nullable. | Kotlin

Kotlin - Null Safety

Identify the error in this Kotlin code snippet:

val list: List = listOf(1, 2, null, 4)

AThe list declaration syntax is incorrect.

BThe list cannot contain <code>null</code> because <code>Int</code> is non-nullable.

CThe <code>listOf</code> function cannot be used with integers.

DThere is no error; the code compiles fine.

Step-by-Step Solution

Solution:

Step 1: Check element type and values
The list is declared as List<Int>, which means elements cannot be null.
Step 2: Identify the presence of null
The list contains a null value, which is not allowed for non-nullable types, causing a compilation error.
Final Answer:
The list cannot contain null because Int is non-nullable. -> Option B
Quick Check:
Non-nullable list disallows null elements [OK]

Quick Trick: Non-nullable types disallow null values in collections [OK]

Common Mistakes:

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