Each for iteration in Ruby - Mini Project: Build & Apply

Using Each For Iteration in Ruby

📖 Scenario: You work in a small bookstore. You have a list of book titles and their prices. You want to print each book's name and price to share with your team.

🎯 Goal: Build a Ruby program that uses each with for iteration to go through a hash of books and prices, then print each book and its price.

📋 What You'll Learn

Create a hash called books with exact keys and values

Create a variable called total_price and set it to 0

Use for title, price in books.each to iterate over the hash

Add each price to total_price

Print each book title and price inside the loop

After the loop, print the total price

💡 Why This Matters

🌍 Real World

Bookstores and shops often need to list items with prices and calculate totals for sales or inventory.

💼 Career

Knowing how to iterate over collections and sum values is a basic skill for many programming jobs, especially in retail or data processing.

1

Create the books hash

Create a hash called books with these exact entries: 'Ruby Basics' => 25, 'JavaScript Guide' => 30, 'Python 101' => 20

Ruby

# Create the books hash with exact entries
# Your code here

Need a hint?

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

2

Create a total price variable

Create a variable called total_price and set it to 0

Ruby

books = { 'Ruby Basics' => 25, 'JavaScript Guide' => 30, 'Python 101' => 20 }
# Create total_price variable and set to 0
# Your code here

Need a hint?

Use = to assign 0 to total_price.

3

Use each for iteration to sum prices and print books

Use for title, price in books.each to iterate over the books hash. Inside the loop, add price to total_price and print the book title and price using puts with the format: "Title: #{title}, Price: $#{price}"

Ruby

books = { 'Ruby Basics' => 25, 'JavaScript Guide' => 30, 'Python 101' => 20 }
total_price = 0
# Use for each iteration to add prices and print books
# Your code here

Need a hint?

Use for title, price in books.each to loop. Use total_price += price to add prices. Use puts with string interpolation to print.

4

Print the total price

After the loop, print the total price using puts with the format: "Total price: $#{total_price}"

Ruby

books = { 'Ruby Basics' => 25, 'JavaScript Guide' => 30, 'Python 101' => 20 }
total_price = 0
for title, price in books.each
  total_price += price
  puts "Title: #{title}, Price: $#{price}"
end
# Print the total price
# Your code here

Need a hint?

Use puts after the loop to print the total price with string interpolation.