[Solved] What does Kotlin's smart cast feature do inside an if or when block? — Ans: Automatically treats a variable as a specific type after a type check | Kotlin

Kotlin - Control Flow as Expressions

What does Kotlin's smart cast feature do inside an if or when block?

ADisables type checking inside the block

BRequires explicit casting of variables after type checks

CAutomatically treats a variable as a specific type after a type check

DConverts all variables to strings inside the block

Step-by-Step Solution

Solution:

Step 1: Understand smart cast purpose
Smart casts let Kotlin automatically treat a variable as a more specific type after you check its type.
Step 2: Apply to if/when blocks
Inside if or when, Kotlin knows the variable's type and lets you use it without manual casting.
Final Answer:
Automatically treats a variable as a specific type after a type check -> Option C
Quick Check:
Smart cast = automatic type use after check [OK]

Quick Trick: Smart casts auto-change type after check in if/when [OK]

Common Mistakes:

MISTAKES

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What does Kotlin's smart cast feature do inside an if or when block?