val mutableList vs var immutableList . When to use which in Kotlin?

Here's an explanation of the differences between val mutableList and var immutableList in Kotlin, and when to use each:

val mutableList

• A val mutableList is a mutable list that is declared using the val keyword.
• It allows you to modify the contents of the list, such as adding, removing, or updating elements.
• However, you cannot reassign the list to a different reference.

Example:

val mutableList = mutableListOf(1, 2, 3)
mutableList.add(4) // Allowed
mutableList = emptyList() // Not allowed

var immutableList

• A var immutableList is an immutable list that is declared using the var keyword.
• It allows you to reassign the list to a different reference.
• However, you cannot modify the contents of the list once it is created.

Example:

var immutableList = listOf(1, 2, 3)
immutableList = emptyList() // Allowed
immutableList.add(4) // Not allowed

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