[Solved] You want to keep track of a user's score that changes during the game. Which Kotlin declaration is best suited for this?1) val score = 0 2) var score = 0 3) const val score = 0 4) val var score = 0 | Kotlin

Kotlin - Variables and Type System

You want to keep track of a user's score that changes during the game. Which Kotlin declaration is best suited for this?

1) val score = 0
2) var score = 0
3) const val score = 0
4) val var score = 0

A1 only

B2 only

C3 only

D4 only

Step-by-Step Solution

Solution:

Step 1: Understand mutability needs
The score changes during the game, so it must be mutable.
Step 2: Evaluate each declaration
1) uses val (immutable), 2) uses var (mutable), 3) uses const val (compile-time constant), 4) is invalid syntax.
Final Answer:
2 only -> Option B
Quick Check:
Mutable variable for changing score = A [OK]

Quick Trick: Use var for values that change over time [OK]

Common Mistakes:

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You want to keep track of a user's score that changes during the game. Which Kotlin declaration is best suited for this?