import java.util.*;

class Test {

public static void main(String[] args) {

System.out.println("請輸入要進行判斷的整數：");

Scanner sc = new Scanner(System.in);

int number = sc.nextInt();

System.out.println("您輸入的整數是：" + number);

if(isPrimeNumber(number)) {

System.out.println("您輸入的數" + number + "是素數。");

} else {

System.out.println("您輸入的數" + number + "不是是素數。");

}

}

//判斷素數的靜態方法

public static boolean isPrimeNumber(int num) {

boolean flag = true;

if(num == 2) {

return flag;

}

for(int i = 1; i < Math.sqrt(num); i++) {

if(num % 2 == 0) {

flag = false;

break;

}

}

return flag;

}

}