[Solved] You want to create a list of user names that should never change after creation. Which Kotlin declaration is best and why?val users = listOf("Anna", "Bob", "Cara") | Kotlin

Kotlin - Variables and Type System

You want to create a list of user names that should never change after creation. Which Kotlin declaration is best and why?

val users = listOf("Anna", "Bob", "Cara")

AUse <code>val</code> with <code>listOf</code> because it creates an immutable list and reference.

BUse <code>val</code> with <code>mutableListOf</code> to allow adding users later.

CUse <code>var</code> with <code>listOf</code> because the list can be changed later.

DUse <code>var</code> with <code>mutableListOf</code> to change the list and reference.

Step-by-Step Solution

Solution:

Step 1: Understand immutability of variable and list
val means the reference cannot change, and listOf creates an immutable list that cannot be modified.
Step 2: Compare options
Use val with listOf because it creates an immutable list and reference. uses val and listOf, ensuring both the reference and list contents cannot change, which matches the requirement.
Final Answer:
Use val with listOf because it creates an immutable list and reference. -> Option A
Quick Check:
val + listOf = fully immutable list [OK]

Quick Trick: val + listOf = fixed list and reference [OK]

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You want to create a list of user names that should never change after creation. Which Kotlin declaration is best and why?