Comparing structs vs classes decision in Swift - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a struct named Person.

Swift

struct [1] {
    var name: String
    var age: Int
}

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APerson

Bclass

Cvar

Dfunc

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'class' instead of the struct name.

Forgetting to name the struct.

The keyword Person is the name of the struct we want to define.

2fill in blank

medium

Complete the code to create an instance of the struct Person.

Swift

let person = [1](name: "Alice", age: 30)

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Afunc

Bclass

Cstruct

DPerson

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'class' or 'struct' keywords instead of the struct name.

Trying to call a function that does not exist.

To create an instance of a struct, use its name as a function.

3fill in blank

hard

Fix the error in the code to copy a struct instance correctly.

Swift

var person1 = Person(name: "Bob", age: 25)
var person2 = person1
person2.name = [1]

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ACharlie

Bperson1

C"Charlie"

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to put quotes around the string.

Assigning a variable name instead of a string.

To assign a new name, use a string literal with quotes.

4fill in blank

hard

Fill both blanks to define a class and create its instance.

Swift

[1] PersonClass {
    var name: String
    init(name: String) {
        self.name = name
    }
}
let person = [2](name: "Dana")

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

Aclass

Bstruct

CPersonClass

DPersonStruct

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'struct' instead of 'class' to define a class.

Using the wrong name when creating an instance.

Use class to define a class and the class name to create an instance.

5fill in blank

hard

Fill all three blanks to compare struct and class behavior.

Swift

var struct1 = Person(name: "Eve", age: 40)
var struct2 = struct1
struct2.age [1] 41

var class1 = [2](name: "Frank")
var class2 = class1
class2.name [3] "George"

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

A=

BPersonClass

C!=

DPersonStruct

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' instead of '=' for assignment.

Confusing struct and class names.

Use = to assign new values. PersonClass is the class used. Structs copy values, classes share references.