Any type as universal base in Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a variable that can hold any type of value.

Kotlin

val value: [1] = 42

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

AInt

BString

CAny

DUnit

Attempts:

3 left

💡 Hint

Common Mistakes

Using a specific type like Int or String limits the variable to that type only.

The Any type in Kotlin is the universal base type that can hold any value.

2fill in blank

medium

Complete the code to assign a string value to a variable of type Any.

Kotlin

val data: Any = [1]

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

Anull

B"Hello"

Ctrue

D100

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning a value without quotes when it should be a string.

You can assign any value to a variable of type Any. Here, a string literal "Hello" is assigned.

3fill in blank

hard

Fix the error in the code by choosing the correct type for the variable that can hold any value.

Kotlin

var item: [1] = 3.14

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

AAny

BInt

CString

DDouble

Attempts:

3 left

💡 Hint

Common Mistakes

Using a specific type like Double limits the variable to only that type.

The variable item should be of type Any to hold any value, including a Double.

4fill in blank

hard

Fill both blanks to create a function that accepts any type and returns its string representation.

Kotlin

fun describe(value: [1]): [2] = value.toString()

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

AAny

BString

CInt

DUnit

Attempts:

3 left

💡 Hint

Common Mistakes

Using a specific type for the parameter or wrong return type.

The function parameter is of type Any to accept any value, and it returns a String representation.

5fill in blank

hard

Fill all three blanks to create a list of Any type and add different types of elements.

Kotlin

val items = mutableListOf<[1]>()
items.add([2])
items.add([3])

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

AAny

B"Kotlin"

C42

DString

Attempts:

3 left

💡 Hint

Common Mistakes

Using a specific type for the list or adding elements without correct types.

The list is of type Any to hold any kind of element. We add a string and an integer to it.