/* CountPrimes.java
 * This program reads in two integers a and b
 * and count the number of primes in the range [a,b].
 */

import java.util.*;

class CountPrimes {	

    public static void main(String args[]) {
        Scanner scanner = new Scanner(System.in);

        System.out.print("Enter lower limit: ");
        int a = scanner.nextInt();
        System.out.print("Enter upper limit: ");
        int b = scanner.nextInt();

        int count = 0;
        for (int i=a; i<=b; i++) 
            // Making use of the isPrime(int) method in Prime class
            if (Prime.isPrime(i)) {
                // System.out.println("Prime is: " + i); // for checking
                count++;
            }

        System.out.println("Number of primes: " + count);
    }
}