Add Expense

Part of the Fundamentals section of Coddy's Ruby journey — lesson 81 of 88.

Challenge

Easy

Build upon your expense tracker from the previous lesson by adding the "Add Expense" functionality.

Your program should:

Initialize an empty array called expenses
Create a loop do that displays the menu and reads user input
When the user enters "1", prompt for the expense name and amount, create a hash with :name and :amount keys, add it to the expenses array, and print Expense added!
When the user enters "5", print Goodbye! and exit the loop

The menu should display exactly as before:


--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option:

When option "1" is selected, display these prompts:

Expense name:

Then after reading the name:

Amount:

Use print for all prompts (so the cursor stays on the same line). Convert the amount to a float using to_f.

The program will receive multiple inputs in sequence: the menu choice, and if choice is "1", the expense name and amount will follow.

For example, if the inputs are 1, Coffee, 4.50, then 5, the output should be:


--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: Expense name: Amount: Expense added!

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: Goodbye!

If the inputs are 1, Lunch, 12.99, 1, Bus fare, 2.50, then 5, the output should be:


--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: Expense name: Amount: Expense added!

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: Expense name: Amount: Expense added!

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: Goodbye!

Try it yourself

expenses = []

loop do
  puts "\n--- Expense Tracker ---"
  puts "1. Add Expense"
  puts "2. View Expenses"
  puts "3. Total & Average"
  puts "4. Clear All"
  puts "5. Exit"
  print "Choose an option: "
  
  choice = gets.chomp
  
  if choice == "5"
    puts "Goodbye!"
    break
  end
end