Array creation and type inference in Swift - Mini Project: Build & Apply

Array creation and type inference

📖 Scenario: You are organizing a small party and want to keep track of the guests' names using an array.

🎯 Goal: Create an array of guest names using Swift's type inference and then print the list.

📋 What You'll Learn

Create an array called guestNames with exactly these names: "Anna", "Brian", "Catherine"

Create a variable called newGuest and assign it the value "David"

Add newGuest to the guestNames array

Print the guestNames array

💡 Why This Matters

🌍 Real World

Arrays are used to store lists of items like guest names, product lists, or scores in many apps.

💼 Career

Understanding arrays and type inference is essential for Swift developers building iOS apps that manage collections of data.

1

Create the initial array

Create an array called guestNames with these exact names: "Anna", "Brian", "Catherine". Use Swift's type inference by not specifying the type explicitly.

Swift

// Create the array guestNames with the names "Anna", "Brian", "Catherine"
// Your code here

Need a hint?

Use square brackets to create an array and assign it to guestNames.

2

Add a new guest variable

Create a variable called newGuest and assign it the value "David".

Swift

var guestNames = ["Anna", "Brian", "Catherine"]
// Create a variable newGuest and assign it "David"
// Your code here

Need a hint?

Use var newGuest = "David" to create the variable.

3

Add the new guest to the array

Add the newGuest variable to the guestNames array using the append method.

Swift

var guestNames = ["Anna", "Brian", "Catherine"]
var newGuest = "David"
// Add newGuest to guestNames using append
// Your code here

Need a hint?

Use guestNames.append(newGuest) to add the new guest.

4

Print the guest list

Print the guestNames array to show all guest names.

Swift

var guestNames = ["Anna", "Brian", "Catherine"]
var newGuest = "David"
guestNames.append(newGuest)
// Print the guestNames array
// Your code here

Need a hint?

Use print(guestNames) to display the array.