If and if-else statements in Swift - Mini Project: Build & Apply

If and if-else statements

📖 Scenario: You are creating a simple app that checks the temperature outside and gives advice on what to wear.

🎯 Goal: Build a program that uses if and if-else statements to decide what message to show based on the temperature.

📋 What You'll Learn

Create a variable to store the temperature as an integer

Create a variable to store a temperature limit

Use an if statement to check if the temperature is below the limit

Use an if-else statement to print different messages based on the temperature

💡 Why This Matters

🌍 Real World

Apps often need to make decisions based on data, like weather apps telling you what to wear.

💼 Career

Understanding <code>if</code> and <code>if-else</code> statements is essential for controlling program flow in any software development job.

1

DATA SETUP: Create a temperature variable

Create a variable called temperature and set it to 15.

Swift

// Create a variable called temperature and set it to 15
// Your code here

Need a hint?

Use var to create a variable and assign the number 15 to temperature.

2

CONFIGURATION: Create a temperature limit variable

Create a variable called limit and set it to 20.

Swift

var temperature = 15
// Create a variable called limit and set it to 20
// Your code here

Need a hint?

Use var to create a variable named limit and assign it the value 20.

3

CORE LOGIC: Use an if statement to check temperature

Write an if statement that checks if temperature is less than limit. Inside the if, write a comment // It's cold.

Swift

var temperature = 15
var limit = 20
// Write an if statement to check if temperature is less than limit
// Inside the if, add a comment // It's cold
// Your code here

Need a hint?

Use if temperature < limit { } and put the comment inside the braces.

4

OUTPUT: Use if-else to print messages

Write an if-else statement that checks if temperature is less than limit. If true, print "Wear a jacket". Otherwise, print "No jacket needed".

Swift

var temperature = 15
var limit = 20
if temperature < limit {
    // It's cold
}
// Write an if-else statement to print the correct message
// Your code here

Need a hint?

Use if temperature < limit { print("Wear a jacket") } else { print("No jacket needed") }.