Comparison operators in Swift - Mini Project: Build & Apply

Comparison Operators in Swift

📖 Scenario: You are helping a small shop owner compare prices of two products to decide which one is cheaper or if they cost the same.

🎯 Goal: Build a simple Swift program that compares two product prices using comparison operators and shows the result.

📋 What You'll Learn

Create two variables with exact prices

Create a variable to hold a comparison threshold

Use comparison operators to compare the prices

Print the comparison result clearly

💡 Why This Matters

🌍 Real World

Comparing prices helps shop owners decide which product to promote or buy.

💼 Career

Understanding comparison operators is essential for decision-making logic in software development.

1

Create price variables

Create two variables called priceA and priceB with values 19.99 and 24.99 respectively.

Swift

# Create two price variables
# Your code here

Need a hint?

Use var to create variables and assign the exact decimal values.

2

Add a price difference threshold

Create a variable called threshold and set it to 0.01 to allow small price differences.

Swift

var priceA = 19.99
var priceB = 24.99
# Create a threshold variable
# Your code here

Need a hint?

This threshold helps to consider prices equal if they differ by less than this amount.

3

Compare the prices using comparison operators

Use if statements with ==, <, and > operators to compare priceA and priceB considering the threshold. Create a variable result that stores the string "Prices are equal", "Price A is cheaper", or "Price B is cheaper" accordingly.

Swift

var priceA = 19.99
var priceB = 24.99
var threshold = 0.01
# Compare prices and set result string
# Your code here

Need a hint?

Use abs() to find the difference and compare with threshold. Assign the correct message to result.

4

Print the comparison result

Print the value of the variable result to show the comparison outcome.

Swift

var priceA = 19.99
var priceB = 24.99
var threshold = 0.01
var result: String
if abs(priceA - priceB) <= threshold {
    result = "Prices are equal"
} else if priceA < priceB {
    result = "Price A is cheaper"
} else {
    result = "Price B is cheaper"
}
# Print the result
# Your code here

Need a hint?

Use print(result) to display the message.