java 生成两个数之间的素数

//print all prime numbers within a number

import java.util.Scanner;

public class Numbers {

    public static void main(String[] args) {
        int beg, end;
        Scanner ip = new Scanner(System.in);
        System.out.print("Enter the beginning value: ");
        beg = ip.nextInt();
        System.out.print("Enter the ending value: ");
        end = ip.nextInt();
        for (int i = beg; i <= end; i++) {
            if (isPrime(i))
                System.out.print(i + " ");
        }
        ip.close();
    }

    private static boolean isPrime(int num) {
        for (int i = 2; i <= Math.sqrt(num); i++) {
            if (num % i == 0)
                return false;
        }
        return true;
    }
}



OUTPUT:
Enter the beginning value: 50
Enter the ending value: 100
53 59 61 67 71 73 79 83 89 97