题解 | 素数判断

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextInt()) { // 注意 while 处理多个 case
            int num = in.nextInt();
            for (int i = 0; i < num; i++) {
                int num2 = in.nextInt();
                if (num2 == 1) {
                    System.out.println("No");
                } else if (num2 == 2) {
                    System.out.println("Yes");
                } else {
                    for (int j = 2; j < num2; j++) {
                        if (num2 % j == 0) {
                            System.out.println("No");
                            break;
                        }
                        if (j==num2-1){
                            System.out.println("Yes");
                        }
                    }
                }
            }

        }
    }
}