Clear All

Part of the Fundamentals section of Coddy's Ruby journey — lesson 84 of 88.

Challenge

Easy

Build upon your expense tracker by adding the "Clear All" 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 "2", display all expenses or a message if none exist
When the user enters "3", calculate and display the total and average of all expenses, or a message if none exist
When the user enters "4", clear all expenses from the array and print a confirmation message
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 "4" is selected, use the clear method on the expenses array and print: All expenses cleared!

For example, if the inputs are 1, Coffee, 5.0, 4, 2, then 5 (add an expense, clear all, then view), 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: All expenses cleared!

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: No expenses recorded yet.

--- 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, 12.0, 1, Dinner, 25.0, 3, 4, 3, then 5 (add two expenses, check total, clear, check total again), 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: Total: $37.0
Average: $18.5

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

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: No expenses to calculate.

--- 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 "--- 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 == "1"
    print "Expense name: "
    name = gets.chomp
    print "Amount: "
    amount = gets.chomp.to_f
    expense = { name: name, amount: amount }
    expenses << expense
    puts "Expense added!"
  elsif choice == "2"
    if expenses.empty?
      puts "No expenses recorded."
    else
      expenses.each do |expense|
        puts "#{expense[:name]}: $#{expense[:amount]}"
      end
    end
  elsif choice == "3"
    if expenses.empty?
      puts "No expenses to calculate."
    else
      total = 0
      expenses.each do |expense|
        total += expense[:amount]
      end
      average = total / expenses.length
      puts "Total: $#{total}"
      puts "Average: $#{average}"
    end
  elsif choice == "5"
    puts "Goodbye!"
    break
  end
  
  puts ""
end