Switch with where clauses in Swift - Mini Project: Build & Apply

Switch with where clauses

📖 Scenario: You are building a simple program to categorize ages into life stages using Swift's switch statement with where clauses. This helps you understand how to add extra conditions to each case.

🎯 Goal: Create a Swift program that uses a switch statement with where clauses to print the life stage of a person based on their age.

📋 What You'll Learn

Create an age variable with the value 25

Create a switch statement on age

Use where clauses in case statements to check age ranges

Print the correct life stage for the given age

💡 Why This Matters

🌍 Real World

Using switch with where clauses helps you handle multiple conditions clearly, like categorizing ages, grades, or other ranges in apps.

💼 Career

Understanding switch with where clauses is useful for Swift developers building iOS apps that need clear, readable decision-making code.

1

Create the age variable

Create a variable called age and set it to 25.

Swift

# Create a variable called age and set it to 25
// Your code here

Need a hint?

Use var age = 25 to create the variable.

2

Start the switch statement on age

Write a switch statement on the variable age.

Swift

var age = 25

// Start a switch statement on age
// Your code here

Need a hint?

Use switch age { } to start the switch statement.

3

Add case statements with where clauses

Inside the switch on age, add these case statements with where clauses:
1. case let x where x < 13: print "Child"
2. case let x where x < 20: print "Teenager"
3. case let x where x < 65: print "Adult"
4. default: print "Senior"

Swift

var age = 25

switch age {
    // Add case statements with where clauses here
    // Your code here
}

Need a hint?

Use case let x where condition: to add conditions inside switch cases.

4

Run the program to print the life stage

Run the program so it prints the life stage for the age 25.

Swift

var age = 25

switch age {
case let x where x < 13:
    print("Child")
case let x where x < 20:
    print("Teenager")
case let x where x < 65:
    print("Adult")
default:
    print("Senior")
}

// Run the program to see the output
// Your code here

Need a hint?

Just run the program. It will print the life stage automatically.