What I have is a simple, convert a temperature in Fahrenheit to Celsius or in Celsius to Fahrenheit. My question: what is the best approach of implementing the while/loops so that the user enters their choice for Celsius to Fahrenheit or vice versa as many times as they want until using a 3 to stop.

``````package project1;

import java.util.Scanner;

public class Main {

double fahrenheit;
double celsius;
int choice;

public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print("Please choose one of the following");
System.out.println (" by entering it's numeric value:  " +
"1. Fahrenheit to Celsius  " +
"2. Celsius to Fahrenheit  ");
int choice = input.nextInt();

double enteredTemperature;// temperature asked from user
double convertedTemperature;// temperature converted

if (choice == 1){
System.out.println("Enter Temperature in Fahrenheit : ");

enteredTemperature = input.nextDouble();
convertedTemperature = (5.0/9) * (enteredTemperature - 32);

System.out.println("Degrees in celsius: ");
System.out.println(convertedTemperature);}

else if (choice == 2){
System.out.println("Enter Temperature in C " );
enteredTemperature = input.nextDouble();
convertedTemperature = (9.0/5)* enteredTemperature + 32;
System.out.println("Degrees in F ");
System.out.println(convertedTemperature);}
}

}``````
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Last Post by BestJewSinceJC

One good way to do this would be the following

``````//assuming your Scanner object is called input
do{
int choice = -1;