Argument labels and parameter names in Swift - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a function with an argument label.

Swift

func greet([1] name: String) {
    print("Hello, \(name)!")
}

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

Aat

Bwith

Cfor

Dto

Attempts:

3 left

💡 Hint

Common Mistakes

Using the parameter name directly without an argument label.

Choosing a label that doesn't make sense for greeting.

The argument label 'to' is used before the parameter name 'name' to call the function like greet(to: "Anna").

2fill in blank

medium

Complete the code to call the function using the correct argument label.

Swift

greet([1]: "Sam")

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

Ato

Bfor

Cwith

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Using the parameter name instead of the argument label.

Omitting the label entirely.

The function was defined with the argument label 'to', so the call must use greet(to: "Sam").

3fill in blank

hard

Fix the error in the function definition by adding the correct argument label.

Swift

func multiply([1] number: Int, by multiplier: Int) -> Int {
    return number * multiplier
}

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

A_

Bwith

Cby

Dfor

Attempts:

3 left

💡 Hint

Common Mistakes

Using '_' which removes the argument label but breaks the call style.

Using a label that doesn't match the function call.

The argument label 'by' is used before the parameter 'number' to match the function call style multiply(by: 3, by: 4).

4fill in blank

hard

Fill both blanks to define a function with argument labels for both parameters.

Swift

func divide([1] dividend: Int, [2] divisor: Int) -> Int {
    return dividend / divisor
}

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

Aby

B_

Cwith

Dfrom

Attempts:

3 left

💡 Hint

Common Mistakes

Using '_' which removes labels and makes calls less clear.

Using labels that don't match the division concept.

The argument labels 'from' and 'by' make the function call read naturally: divide(from: 10, by: 2).

5fill in blank

hard

Fill all three blanks to define a function with argument labels and parameter names.

Swift

func calculateArea([1] width: Double, [2] height: Double, [3] unit: String) -> String {
    let area = width * height
    return "Area is \(area) \(unit)²"
}

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

A_

Bwith

Cand

Dof

Attempts:

3 left

💡 Hint

Common Mistakes

Adding labels to the first parameter which is usually unlabeled.

Using labels that don't fit the meaning of the parameters.

Using '_' for width means no label needed, 'with' for height and 'of' for unit make the call read: calculateArea(5.0, with: 10.0, of: "meters").