Switch with compound cases in Swift - Mini Project: Build & Apply

Switch with compound cases

📖 Scenario: Imagine you are building a simple app that categorizes fruits based on their names. You want to group some fruits together because they share similar characteristics.

🎯 Goal: You will create a program that uses a switch statement with compound cases to print the category of a fruit.

📋 What You'll Learn

Create a variable called fruit with the value "apple".

Create a variable called citrusFruits that holds the fruits "orange" and "lemon".

Use a switch statement on the fruit variable with compound cases to check if the fruit is an apple or banana, or if it is a citrus fruit.

Print the category of the fruit using print.

💡 Why This Matters

🌍 Real World

Grouping items by categories is common in apps that organize data, like grocery lists or inventory systems.

💼 Career

Understanding switch statements with compound cases helps in writing clear and efficient code for decision-making in many software projects.

1

Create the fruit variable

Create a variable called fruit and set it to the string "apple".

Swift

# Create a variable called fruit and set it to "apple"
# Your code here

Need a hint?

Use var fruit = "apple" to create the variable.

2

Create the citrusFruits array

Create a variable called citrusFruits and set it to an array containing the strings "orange" and "lemon".

Swift

var fruit = "apple"
# Create a variable called citrusFruits with ["orange", "lemon"]
# Your code here

Need a hint?

Use var citrusFruits = ["orange", "lemon"] to create the array.

3

Write the switch statement with compound cases

Write a switch statement on the variable fruit. Use compound cases to group "apple" and "banana" together, and use the citrusFruits array to group citrus fruits. For "apple" and "banana", print "Common fruit". For citrus fruits, print "Citrus fruit". For any other fruit, print "Other fruit".

Swift

var fruit = "apple"
var citrusFruits = ["orange", "lemon"]
# Write a switch statement on fruit with compound cases
# Your code here

Need a hint?

Use case "apple", "banana" for the first group and case let x where citrusFruits.contains(x) for citrus fruits.

4

Print the result

Run the program to print the category of the fruit stored in fruit.

Swift

var fruit = "apple"
var citrusFruits = ["orange", "lemon"]
switch fruit {
case "apple", "banana":
    print("Common fruit")
case let x where citrusFruits.contains(x):
    print("Citrus fruit")
default:
    print("Other fruit")
}
# Run the program to see the output

Need a hint?

The output should be Common fruit because fruit is "apple".