if (temperature.contains("F")) {
                                    temperature = temperature.replace(f , ' ');
                                    temp = Double.valueOf(temperature);
                                    answer = temp - 30 / 2;
                                    System.out.println("Poof! The temperature is " + answer + "C");
                            } else {
                                    System.out.println("You entered the temperature wrong!");

                                    if (temperature.contains("F")) {
                                        temperature = temperature.replace(f , ' ');
                                        temp = Double.valueOf(temperature);
                                        answer = temp - 30 / 2;
                                        System.out.println("Poof! The temperature is " + answer + "C");
                                } else {
                                        System.out.println("You entered the temperature wrong!");
                                }