How does java judge whether a number is a prime?
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Prime numbers (prime number), also known as prime numbers, have infinite numbers.
A prime number is defined as that in a natural number greater than 1, there is no other factor except 1 and itself, which is called a prime number.
Import java.util.Scanner;public class TestWork {public static void main (String [] args) {boolean isPrime = true; Scanner sc = new Scanner (System.in); System.out.println ("Please enter a positive integer"); int num = sc.nextInt (); if (num > 0) {int k = (int) Math.sqrt (num); / / k is the positive square root of num, take the integer for (int I = 2; I)
