[Solved] Find the issue in this Kotlin snippet:var age: Int = 25 age = null — Ans: Cannot assign null to non-nullable Int | Kotlin

Kotlin - Null Safety

Find the issue in this Kotlin snippet:

var age: Int = 25
age = null

AVariable age is immutable

BCode is correct

CMissing type declaration

DCannot assign null to non-nullable Int

Step-by-Step Solution

Solution:

Step 1: Analyze variable mutability and type
age is mutable var of non-nullable type Int.
Step 2: Check assignment of null
Assigning null to non-nullable Int is not allowed and causes compilation error.
Final Answer:
Cannot assign null to non-nullable Int -> Option D
Quick Check:
Non-nullable Int cannot be null [OK]

Quick Trick: Non-nullable Int rejects null even if mutable [OK]

Common Mistakes:

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