[Solved] What will be the output of this Kotlin code?val x: Int = 10val y: Long = 20Lval sum = x + y — Ans: Compilation error due to type mismatch | Kotlin

Kotlin - Data Types

What will be the output of this Kotlin code?

val x: Int = 10
val y: Long = 20L
val sum = x + y

A30

BCompilation error due to type mismatch

C30L

DRuntime error

Step-by-Step Solution

Solution:

Step 1: Analyze the types involved in the addition
x is Int, y is Long. Kotlin does not automatically convert Int to Long in arithmetic.
Step 2: Check if implicit conversion happens
Kotlin requires explicit conversion; adding Int and Long directly causes a type mismatch error.
Final Answer:
Compilation error due to type mismatch -> Option B
Quick Check:
Int + Long without conversion = error [OK]

Quick Trick: Int and Long cannot be added without explicit conversion [OK]

Common Mistakes:

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