Java how to create a fahrenheit celcius converter

import java.util.Scanner;
  
public class TempConverter
{
  public static double celsiusToFahrenheit( double celsius)
  {
    return (celsius * 9.0 / 5.0 + 32.0);
  }

  public static double fahrenheitToCelsius( double fahrenheit)
  {
    return ((fahrenheit-32) * 5.0 / 9.0);
  }


  public static void main( String[] args )
  {
    Scanner scan = new Scanner(System.in);
    while (true)
    {
      System.out.println("Choose:\n'F' to enter a temperature in Fahrenheit. \n'C' to enter a temperature in Celsius\nAny other character to quit");
      String choice = scan.next();
      if ( choice.equals("F") )
      {
        System.out.println("Enter the temperature in Fahrenheit degrees");
        double fahrenheit = scan.nextDouble();
        System.out.printf("%.2f Fahrenheit degreees are %.2f Celsius degrees\n", fahrenheit, fahrenheitToCelsius(fahrenheit));
      }
      else if ( choice.equals("C") )
      {
        System.out.println("Enter the temperature in Celsius degrees");
        double celsius = scan.nextDouble();
        System.out.printf("%.2f Celsius degreees are %.2f Fahrenheit degrees\n", celsius, celsiusToFahrenheit(celsius));
      }
      else
        break;
    }
  }
};