Scanner s = new Scanner(System.in);
           
           double g, Q, M = 0, iT, fT, finalTemp, initialTemp;
           int amountOfWater;
           System.out.println("Enter the amount of water in gram: ");
           amountOfWater = s.nextInt();
           System.out.println("Enter the initial temperature in Fahrenheit: ");
           initialTemp = s.nextDouble();
           System.out.println("Enter the final temperature in Fahrenheit: ");
           finalTemp = s.nextDouble();
           
           M =amountOfWater/1000;
           iT = (initialTemp - 32)/1.8;
           fT = (finalTemp - 32)/1.8;
           Q = M *(fT - iT)*4184;
           
           System.out.printf("The energy needed is " + Q);