Using standard input to ask a user to run a program again.

Question:

I have a program that does some calculations for the user and at the end there is a out statment that says. "would you like to run the program again?" I'd like the user to able to input yes or no.

Answer:

Use a while() loop and either break out or run again after the response from the scanner input.

Code:

import java.util.*;
 
public class RunAgain {
   public static void main(String[] args) {
 
      Scanner sc = new Scanner(System.in);
 
      while(true) {
         System.out.println("Doing stuff....");
 
         System.out.print("Run again: ");
         String input = sc.nextLine();
         if(! input.equals("yes")){
            break;
         }
      }
      System.out.println("Goodbye");
   }
}

Output:

$ java RunAgain 
Doing stuff....
Run again: yes
Doing stuff....
Run again: yes
Doing stuff....
Run again: no
Goodbye