Ruby

Methods

# Write your code here

puts calculate_discount(100, "percent", 20) # Output: 80.0
puts calculate_discount(100, "fixed", 30) # Output: 70.0
puts calculate_discount(100, "fixed", 150) # Output: 0.0
puts calculate_discount(100, "unknown", 10) # Output: "Invalid discount type"


def calculate_discount(price, discount_type, discount_value)
  if discount_type != "percent" && discount_type != "fixed"
    return "Invalid discount type"
  end

  case discount_type
  when "percent"
    discount_amount = price * (discount_value / 100.0)
  when "fixed"
    discount_amount = discount_value
  end

  final_price = price - discount_amount
  final_price = [final_price, 0].max

  final_price
end

puts calculate_discount(100, "percent", 20) # Output: 80.0
puts calculate_discount(100, "fixed", 30) # Output: 70
puts calculate_discount(100, "fixed", 150) # Output: 0
puts calculate_discount(100, "unknown", 10) # Output: "Invalid discount type"
