import java.util.*;
public class Ex1
{
 public static void main (String [] args)
 {
  int age;
  char r;
  Scanner sc = new Scanner (System.in);
 
  do  
  {
   System.out.print ("\nPlease enter your age: ");
   age = sc.nextInt();
 
   /* result is printed by using if statements */
   if (age < 0)
    System.out.print ("Your age can't be negative.");
   if (age >= 0 && age < 5)
    System.out.print ("You are too young to be here.");
   if (age >= 5 && age <= 16)
    System.out.print ("Why are you there? You should be in school.");
   if (age > 16 && age <= 150)
    System.out.print ("You need not be in full-time education. You must like it.");
   if (age > 150)
    System.out.print ("You are very old. We should call Guiness world records.");
 
   /* program will re-run until user enters 'y' or 'Y' */
   System.out.print ("\n\nEnter y or Y to re-run program: ");
   r = sc.next().charAt(0);
  } while (r == 'y' || r == 'Y');
 
 }
}
 
/* OUTPUT
 
Please enter your age: 3
You are too young to be here.
 
Enter y or Y to re-run program: y
 
Please enter your age: 9
Why are you there? You should be in school.
 
Enter y or Y to re-run program: y
 
Please enter your age: 17
You need not be in full-time education. You must like it.
 
Enter y or Y to re-run program: y
 
Please enter your age: 155
You are very old. We should call Guiness world records.
 
Enter y or Y to re-run program: y
 
Please enter your age: -5
Your age can't be negative.
 
*/