Clear All

Part of the Fundamentals section of Coddy's Swift journey — lesson 82 of 86.

Challenge

Easy

In the previous lesson, you implemented the "Show total and average" feature. Now, implement the "Clear all expenses" feature for option "4".

Modify your code to handle option "4":

When the user enters "4", remove all elements from the expenses array
Print All expenses cleared! after clearing the array
All other options ("1", "2", "3", and "5") should continue working as before

Hint: Use the removeAll() method to clear all elements from the array.

Expected behavior:

When "4" is entered, clear the expenses array and confirm with a message
After clearing, viewing expenses should show No expenses recorded.
After clearing, showing total/average should show No expenses to calculate.

Example interaction:

1. Add expense
2. View all expenses
3. Show total and average
4. Clear all expenses
5. Exit
1
Enter expense amount:
15.0
Expense added!
1. Add expense
2. View all expenses
3. Show total and average
4. Clear all expenses
5. Exit
1
Enter expense amount:
25.0
Expense added!
1. Add expense
2. View all expenses
3. Show total and average
4. Clear all expenses
5. Exit
2
Your expenses:
- $15.0
- $25.0
1. Add expense
2. View all expenses
3. Show total and average
4. Clear all expenses
5. Exit
4
All expenses cleared!
1. Add expense
2. View all expenses
3. Show total and average
4. Clear all expenses
5. Exit
2
No expenses recorded.
1. Add expense
2. View all expenses
3. Show total and average
4. Clear all expenses
5. Exit
5
Goodbye!

Try it yourself

// Daily Expense Tracker - Menu Display

var expenses: [Double] = []

while true {
    // TODO: Write your code below to print the menu options
    // Each option should be on its own line with the format: "number. option text"
    print("1. Add expense")
    print("2. View all expenses")
    print("3. Show total and average")
    print("4. Clear all expenses")
    print("5. Exit")
    
    let choice = readLine()
    
    if choice == "1" {
        print("Enter expense amount:")
        if let input = readLine(), let amount = Double(input) {
            expenses.append(amount)
            print("Expense added!")
        }
    } else if choice == "2" {
        if expenses.isEmpty {
            print("No expenses recorded.")
        } else {
            print("Your expenses:")
            for expense in expenses {
                print("- $\(expense)")
            }
        }
    } else if choice == "3" {
        if expenses.isEmpty {
            print("No expenses to calculate.")
        } else {
            let total = expenses.reduce(0, +)
            let average = total / Double(expenses.count)
            print("Total: $\(total)")
            print("Average: $\(average)")
        }
    } else if choice == "4" {
        print("Coming soon...")
    } else if choice == "5" {
        print("Goodbye!")
        break
    } else {
        print("Coming soon...")
    }
}