Comparison operators in Ruby - Mini Project: Build & Apply

Comparison operators

📖 Scenario: You are helping a store manager compare product prices to decide which items are cheaper or more expensive.

🎯 Goal: You will write a Ruby program that uses comparison operators to compare product prices and print the results.

📋 What You'll Learn

Create a hash with product names and their prices

Create a variable with a price threshold

Use comparison operators to check if each product price is less than, equal to, or greater than the threshold

Print the comparison results

💡 Why This Matters

🌍 Real World

Stores often compare product prices to decide discounts or promotions.

💼 Career

Understanding comparison operators is essential for decision-making logic in programming jobs.

1

Create the product prices hash

Create a hash called products with these exact entries: 'apple' => 100, 'banana' => 50, 'cherry' => 75

Ruby

# Create the products hash with prices
# Your code here

Need a hint?

Use curly braces {} to create a hash and separate keys and values with =>.

2

Set the price threshold

Create a variable called threshold and set it to 70

Ruby

products = { 'apple' => 100, 'banana' => 50, 'cherry' => 75 }
# Create the threshold variable
# Your code here

Need a hint?

Just assign the number 70 to the variable threshold.

3

Compare product prices to the threshold

Use a products.each loop with variables product and price to compare each price with threshold using <, ==, and > operators. Inside the loop, create a variable result that stores the string "less than" if price < threshold, "equal to" if price == threshold, or "greater than" if price > threshold.

Ruby

products = { 'apple' => 100, 'banana' => 50, 'cherry' => 75 }
threshold = 70
# Loop through products and compare prices
# Your code here

Need a hint?

Use if, elsif, and else inside the loop to set result.

4

Print the comparison results

Inside the products.each loop, add a puts statement to print the message: "The price of #{product} is #{result} the threshold."

Ruby

products = { 'apple' => 100, 'banana' => 50, 'cherry' => 75 }
threshold = 70
products.each do |product, price|
  result = if price < threshold
    "less than"
  elsif price == threshold
    "equal to"
  else
    "greater than"
  end
  # Print the comparison message
  # Your code here
end

Need a hint?

Use puts with string interpolation to print the message inside the loop.