Oil Change Example

oil_change.py

# Get the current mileage and the mileage at the last oil change.
current_mileage = int(input("Enter the current mileage: "))
last_change_mileage = int(input("Enter mileage for last oil change: "))

# Check for valid input.
if current_mileage < last_change_mileage:
    # Display an error if invalid input is found.
    print('The current mileage is less than the last change mileage.  Please try again.')
else:
    # Calculate difference in mileage
    mileage_diff = current_mileage - last_change_mileage

    # Check the mileage difference
    if mileage_diff > 5000:
        print("You need an oil change.")
    else:
        miles_to_drive = 5000 - mileage_diff
        print("You can keep driving for", format(miles_to_drive,",d"), "miles.")