Raw values for enums in Swift - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an enum with raw values of type String.

Swift

enum Direction: String {
    case north = [1]
    case south = "South"
}

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

A"North"

BNorth

C'North'

Dnorth

Attempts:

3 left

💡 Hint

Common Mistakes

Using unquoted identifiers as raw values.

Using single quotes instead of double quotes for strings.

The raw value for the case must be a String literal, so it needs to be in double quotes.

2fill in blank

medium

Complete the code to declare an enum with raw values of type Int starting at 1.

Swift

enum Weekday: Int {
    case monday = [1]
    case tuesday
}

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

A"1"

B1

C0

Dmonday

Attempts:

3 left

💡 Hint

Common Mistakes

Using string "1" instead of integer 1.

Starting raw values at 0 when 1 is required.

Raw values of type Int must be integers. To start at 1, assign monday = 1.

3fill in blank

hard

Fix the error in the enum raw value declaration.

Swift

enum Color: String {
    case red = [1]
    case blue = "Blue"
}

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

Ared

BRed

C'Red'

D"Red"

Attempts:

3 left

💡 Hint

Common Mistakes

Using single quotes instead of double quotes.

Using unquoted identifiers as raw values.

Raw values of type String must be enclosed in double quotes. Using "Red" is correct.

4fill in blank

hard

Fill both blanks to create an enum with raw values and access a raw value.

Swift

enum Planet: Int {
    case earth = [1]
    case mars = [2]
}
let marsValue = Planet.mars.rawValue

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

A3

B2

C4

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using string literals instead of integers.

Assigning the same raw value to both cases.

Assign earth = 2 and mars = 3 to set raw values correctly.

5fill in blank

hard

Fill all three blanks to create an enum with raw values and a function returning a raw value.

Swift

enum Status: String {
    case success = [1]
    case failure = [2]
    case unknown = [3]
}

func getStatusMessage(_ status: Status) -> String {
    return status.rawValue
}

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

A"Success"

B"Failure"

C"Unknown"

D"Error"

Attempts:

3 left

💡 Hint

Common Mistakes

Using unquoted strings or single quotes.

Assigning incorrect raw values that don't match the case.

Each case must have a string raw value in double quotes matching the case meaning.