API_project/Math_module/src/Math_Case/IsPrime.java

package Math_Case;

public class IsPrime {
    public static void main(String[] args) {
        //判断一个数是否为一个质数
        System.out.println(isPrime(998));
    }

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