tempConverter.java

import java.util.*;

public class tempConverter
{

    public static void main(String args[]){
        //initialze variables
        double startTemp = 0;
        int whichConversion;
        double endTemp = 0;
        String endUnit = "no unit";
        int keepGoing = 1;
        
        Scanner scan = new Scanner(System.in);
        
        while(keepGoing == 1){
            //ask for temperature and specify conversion
            System.out.println("Enter a temperature");
            startTemp = scan.nextInt();
            System.out.println("For Celsius to Fahrenheit, enter 1");
            System.out.println("For Fahrenheit to Celsius, enter 2.");
            whichConversion = scan.nextInt();
            
            if(whichConversion == 1){//C to F
                //(9/5 * C) + 32 = F
                endTemp = (9/5.0) * startTemp + 32;
                endUnit = "Fahrenheit";
            }else if(whichConversion == 2){//F to C
                //(F – 32) * 5/9 = C
                endTemp = (startTemp - 32) * (5.0/9);
                endUnit = "Celsius";
            }
            endTemp = (int)(10 * endTemp)/10.0;//round to nearest tenth
            //return results
            System.out.println("Your converted temperature:");
            System.out.println(endTemp + " degrees " + endUnit);
            //restart/finish
            System.out.println("Press 1 for a new conversion, press 2 to end");
            keepGoing = scan.nextInt();
        }
        
    }
}