Recap - Product Hash

Part of the Fundamentals section of Coddy's Ruby journey — lesson 77 of 88.

Challenge

Easy

Read four lines of input:

A product name (string)
An initial price (float)
A new price to update (float)
A quantity to add as a new key-value pair (integer)

Create a hash called product with the following initial key-value pairs:

"name" mapped to the product name
"price" mapped to the initial price (as a float)

Then perform these operations in order:

Print the product name by accessing the "name" key
Update the "price" key with the new price value
Add a new key "quantity" with the quantity value (as an integer)
Check if the key "quantity" exists and print the result (true or false)
Print the total number of key-value pairs in the hash
Print the final hash

For example, if the inputs are Laptop, 999.99, 899.99, and 50, the output should be:

Laptop
true
3
{"name"=>"Laptop", "price"=>899.99, "quantity"=>50}

If the inputs are Keyboard, 75.0, 59.99, and 100, the output should be:

Keyboard
true
3
{"name"=>"Keyboard", "price"=>59.99, "quantity"=>100}

If the inputs are Mouse, 29.99, 24.99, and 200, the output should be:

Mouse
true
3
{"name"=>"Mouse", "price"=>24.99, "quantity"=>200}

Try it yourself

# Read input
product_name = gets.chomp
initial_price = gets.chomp.to_f
new_price = gets.chomp.to_f
quantity = gets.chomp.to_i

# TODO: Write your code below
# 1. Create a hash called 'product' with "name" and "price" keys
# 2. Print the product name by accessing the "name" key
# 3. Update the "price" key with the new price
# 4. Add a new key "quantity" with the quantity value
# 5. Check if "quantity" key exists and print the result
# 6. Print the total number of key-value pairs
# 7. Print the final hash