Percent Passing

package percentpassing;
import java.util.Scanner;
public class PercentPassing {

    public static void main(String[] args) {
        final int SENTINEL = 0;
        int newValue;
        int numValues = 0;
        int passing = 0;
        double avg;
        Scanner input = new Scanner(System.in);
        System.out.print("Average scores above 70%");
        System.out.print("\nEnter a score above 70%("+SENTINEL+ "to quit):");
        newValue = input.nextInt();
        while (newValue !=SENTINEL){
            numValues += 1;
            if (numValues >= 70){
                passing +=1;
            }
            System.out.print("Enter a score("+SENTINEL+"to quit):");
            numValues = input.nextInt();
        }
        input.close();
        avg = (double) passing / (double)numValues;
        System.out.println("Average is "+avg);
    } }