Code runs but gives wrong output!

public static void main(String [] args)    {
        Scanner input = new Scanner(System.in);
        int sentinel = 0;
        double yen = 1;
        // every .0089 cents is eqivalent to 1 japanese yen
        double conversion;
        while (sentinel != 1) {
            System.out.println("\nPlease enter an amount of Yen");
            yen = input.nextDouble();
            if (yen <= 0) {
            // if input is 0 or lower it doesn't convert because that's not an
            //amount of money
            conversion = yen;
            System.out.printf("Not valid amount of currency. Try Again.");
        } else if (yen >= 111.98) {
            // if the input is greater than or equal to 111.98 yen (1 U.S. dollar) the program
            // prints out only the first two decimals to keep it organized
            conversion = yen * .0089;
            System.out.printf("\nThat is %.2f U.S. dollars", conversion);
        } else if (yen < 111.98) {
            // If input is lower than 111.98 it prints out the first 4 decimals because 
            // 1 yen is .0089 cents in the US
            conversion = yen * .0089;
            System.out.printf("\nThat is %.4f U.S. dollars", conversion);
        }
      }
    }