List creation (listOf, mutableListOf) in Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create an immutable list of integers.

Kotlin

val numbers = [1](1, 2, 3, 4, 5)

Drag options to blanks, or click blank then click option'

AlistOf

BmutableListOf

CarrayListOf

DsetOf

Attempts:

3 left

💡 Hint

Common Mistakes

Using mutableListOf instead of listOf creates a mutable list.

Using setOf creates a set, not a list.

The listOf function creates an immutable list in Kotlin.

2fill in blank

medium

Complete the code to create a mutable list of strings.

Kotlin

val fruits = [1]("apple", "banana", "cherry")

Drag options to blanks, or click blank then click option'

AlistOf

BsetOf

CmutableListOf

DarrayOf

Attempts:

3 left

💡 Hint

Common Mistakes

Using listOf creates an immutable list that cannot be changed.

Using arrayOf creates an array, not a list.

The mutableListOf function creates a mutable list that can be changed later.

3fill in blank

hard

Fix the error in the code to create a mutable list of doubles.

Kotlin

val prices = [1](10.5, 20.0, 30.75)

Drag options to blanks, or click blank then click option'

AsetOf

BarrayListOf

ClistOf

DmutableListOf

Attempts:

3 left

💡 Hint

Common Mistakes

Using listOf creates an immutable list that cannot be changed.

Using setOf creates a set, not a list.

To create a mutable list, use mutableListOf. listOf creates an immutable list.

4fill in blank

hard

Fill both blanks to create an immutable list and get its size.

Kotlin

val colors = [1]("red", "green", "blue")
val size = colors.[2]

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AlistOf

BmutableListOf

Csize

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using mutableListOf instead of listOf for an immutable list.

Using count() instead of size property.

listOf creates an immutable list, and size gets the number of items in the list.

5fill in blank

hard

Fill all three blanks to create a mutable list, add an item, and get the last element.

Kotlin

val animals = [1]("cat", "dog")
animals.[2]("rabbit")
val last = animals.[3]()

Drag options to blanks, or click blank then click option'

AmutableListOf

Badd

Clast

DlistOf

Attempts:

3 left

💡 Hint

Common Mistakes

Using listOf instead of mutableListOf for a mutable list.

Using size instead of last() to get the last element.

mutableListOf creates a mutable list, add adds an item, and last() gets the last element.