Enum with switch pattern matching in Swift - Mini Project: Build & Apply

Enum with switch pattern matching

📖 Scenario: Imagine you are building a simple app that shows different messages based on the weather condition. The weather can be sunny, rainy, or snowy.

🎯 Goal: You will create an enum to represent weather conditions, then use a switch statement with pattern matching to print the correct message for each weather type.

📋 What You'll Learn

Create an enum called Weather with cases sunny, rainy, and snowy

Create a variable called today and assign it the Weather.sunny value

Use a switch statement on today with cases for each weather type

Print a message inside each case describing the weather

💡 Why This Matters

🌍 Real World

Enums and switch statements are used in apps to handle different states or options clearly and safely.

💼 Career

Understanding enums and pattern matching is important for Swift developers building iOS apps with clear and maintainable code.

1

Create the Weather enum

Create an enum called Weather with three cases: sunny, rainy, and snowy.

Swift

# Your code here

Need a hint?

Use the enum keyword followed by the name Weather. Inside curly braces, list the cases with the case keyword.

2

Create a variable for today's weather

Create a variable called today and assign it the value Weather.sunny.

Swift

enum Weather {
    case sunny
    case rainy
    case snowy
}

# Your code here

Need a hint?

Use var today = Weather.sunny to create the variable.

3

Use switch to match the weather

Write a switch statement on the variable today. Add cases for .sunny, .rainy, and .snowy. Inside each case, write a print statement with a message describing the weather, for example, print("It's sunny today!").

Swift

enum Weather {
    case sunny
    case rainy
    case snowy
}

var today = Weather.sunny

# Your code here

Need a hint?

Use switch today { case .sunny: ... } and print messages inside each case.

4

Print the weather message

Run the program to print the message for today's weather. The output should be exactly: It's sunny today!

Swift

enum Weather {
    case sunny
    case rainy
    case snowy
}

var today = Weather.sunny

switch today {
case .sunny:
    print("It's sunny today!")
case .rainy:
    print("It's rainy today!")
case .snowy:
    print("It's snowy today!")
}

# Your code here

Need a hint?

Make sure you run the program and see the message printed exactly as shown.