Explicit type declaration in Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a variable with an explicit type.

Kotlin

val name: [1] = "Alice"

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

ABoolean

BInt

CString

DDouble

Attempts:

3 left

💡 Hint

Common Mistakes

Using Int or Boolean for text values.

Forgetting to specify the type explicitly.

The variable name is declared as a String type explicitly.

2fill in blank

medium

Complete the code to declare a variable with explicit integer type.

Kotlin

var age: [1] = 30

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

AInt

BDouble

CString

DBoolean

Attempts:

3 left

💡 Hint

Common Mistakes

Using Double or String for whole numbers.

Not matching the type with the assigned value.

The variable age is declared as an Int type explicitly because it holds a whole number.

3fill in blank

hard

Fix the error in the explicit type declaration.

Kotlin

val isActive: [1] = true

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

AString

BBoolean

CInt

DDouble

Attempts:

3 left

💡 Hint

Common Mistakes

Using String type for Boolean values.

Assigning Boolean values as text strings.

The variable isActive should be declared as Boolean type and assigned a Boolean value true without quotes.

4fill in blank

hard

Fill both blanks to declare a variable with explicit Double type and assign a decimal value.

Kotlin

var price: [1] = [2]

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

ADouble

B30

C19.99

DInt

Attempts:

3 left

💡 Hint

Common Mistakes

Using Int type for decimal numbers.

Assigning whole numbers instead of decimals.

The variable price is declared as Double type to hold decimal numbers, and assigned the decimal value 19.99.

5fill in blank

hard

Fill all three blanks to declare a variable with explicit type and assign a value correctly.

Kotlin

val [1]: [2] = [3]

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

AisAvailable

BBoolean

Cfalse

Dprice

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect variable names.

Assigning Boolean values as strings.

Mismatch between type and assigned value.

The variable isAvailable is declared as Boolean type and assigned the Boolean value false.