Question

Write a program to perform by user's choice:- 1. To convert celsius to fahrenheit.2. To convert Fahrenheit to celsius.
Display wrong choice if choice is wrong.
(Write it in JAVA programming)​

Answer 1

Hope it helps  ^_^

import java.util.Scanner;

public class CelciusToFahrenheit{

   public static void main (String [] args){

       Scanner sc = new Scanner(System.in);

       System.out.println("Press 0 for Celcius to Fahrenheit and 1 for Vice-Versa");

       double choice = sc.nextDouble();

       if (choice == 0){

           System.out.print("Enter the temperature in Celcius: ");

           double tempC = sc.nextDouble();

           double tempF = (tempC*1.8) + 32;

           System.out.println("The temperature in Fahrenheit: " + tempF + "°F");}

       if (choice == 1){

           System.out.print("Enter the temperature in Fahrenheit: ");

           double tempF = sc.nextDouble();

           double tempC = (tempF - 32)/1.8;

           System.out.println("The temperature in Celcius: " + tempC + "°C");}

       if (choice != 0 && choice != 1)

       System.out.println("Enter only 1 or 2 :(");

   }

}

Output:

(i)

Press 1 for Celcius to Fahrenheit and 2 for Vice-Versa

123

Enter only 1 or 2 :(

(ii)

Press 1 for Celcius to Fahrenheit and 2 for Vice-Versa

1

Enter the temperature in Celcius: 37

The temperature in Fahrenheit: 98.60000000000001°F

(iii)

Press 1 for Celcius to Fahrenheit and 2 for Vice-Versa

2

Enter the temperature in Fahrenheit: 98.6

The temperature in Celcius: 36.99999999999999°C