Actor declaration syntax in Swift - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a simple actor named Logger.

Swift

actor [1] {
    func log(message: String) {
        print(message)
    }
}

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Aenum Logger

Bclass Logger

Cstruct Logger

DLogger

Attempts:

3 left

💡 Hint

Common Mistakes

Using class, struct, or enum instead of actor.

In Swift, you declare an actor using the actor keyword followed by the actor's name.

2fill in blank

medium

Complete the code to declare an actor named DataStore with a property count initialized to 0.

Swift

actor DataStore {
    var count: Int = [1]
}

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A0

Bnil

C"0"

D-1

Attempts:

3 left

💡 Hint

Common Mistakes

Using a string "0" instead of the integer 0.

Using nil which is not valid for Int without optional.

The property count is an integer and should be initialized with the number 0.

3fill in blank

hard

Fix the error in the actor declaration by completing the code.

Swift

actor [1] {
    func fetchData() async -> String {
        return "Data"
    }
}

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Afunc DataFetcher

BDataFetcher

Cclass DataFetcher

Dstruct DataFetcher

Attempts:

3 left

💡 Hint

Common Mistakes

Adding keywords like func or class before the actor name.

The actor name should be a simple identifier without keywords like func, class, or struct.

4fill in blank

hard

Fill both blanks to declare an actor named Counter with a method increment that increases count by 1.

Swift

actor [1] {
    var count = 0
    func [2]() {
        count += 1
    }
}

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ACounter

BincrementCount

Cincrement

Dincrease

Attempts:

3 left

💡 Hint

Common Mistakes

Using method names that don't match increment behavior.

Using wrong actor names.

The actor is named Counter and the method to increase count is named increment.

5fill in blank

hard

Fill all three blanks to declare an actor named BankAccount with a balance property and a method deposit that adds amount to balance.

Swift

actor [1] {
    var [2]: Double = 0.0
    func [3](amount: Double) {
        balance += amount
    }
}

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

ABankAccount

Bbalance

Cdeposit

Dwithdraw

Attempts:

3 left

💡 Hint

Common Mistakes

Using withdraw instead of deposit for the method.

Using wrong property names.

The actor is BankAccount, the property is balance, and the method to add money is deposit.