[Solved] Find the issue in this Kotlin snippet:fun main() { val x: Int = 10 val y: Int? = 5 val z: Int = x + y println(z) } | Kotlin

Kotlin - Data Types

Find the issue in this Kotlin snippet:

fun main() {
    val x: Int = 10
    val y: Int? = 5
    val z: Int = x + y
    println(z)
}

AMissing type declaration for z

BVariable y should be non-nullable

CCannot add Int and nullable Int without safe call or Elvis operator

Dprintln cannot print Int values

Step-by-Step Solution

Solution:

Step 1: Analyze types involved in addition
x is Int, y is nullable Int (Int?), cannot add directly without handling null.
Step 2: Identify Kotlin's null safety rules
Must use safe call or Elvis operator to handle nullable y before addition.
Final Answer:
Cannot add Int and nullable Int without safe call or Elvis operator -> Option C
Quick Check:
Nullable addition requires null handling [OK]

Quick Trick: Handle nullable Int before arithmetic [OK]

Common Mistakes:

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