Explanation of the method for determining prime numbers (cyclic structure java) in C Language experiments

Explanation of the method for determining prime numbers (cyclic structure java) in C Language experiments
Explanation of Problem Description using the method of determining prime numbers (cyclic structure java) in C Language experiments

Enter any positive integer on the keyboard and determine whether the number is a prime number.

If it is a prime number, the output "This is a prime ."

Otherwise, the output "This is not a prime ."

Input

Enter any positive integer n (1 <=n <= 1000000 ).

Output

Determine whether n is a prime number and output the result:

If n is a prime number, the output is "This is a prime ."

Otherwise, the output "This is not a prime ."

Sample Input

3

Sample Output

This is a prime.

AC code:

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n;
        n = in.nextInt();
        int i,f=1;
        if (n == 1)
            System.out.println("This is not a prime.");
        else if(n==2)
            System.out.println("This is a prime.");
        else {
          for(i=2;i<n;i++){
             if(n%i==0){
               f = 0;
             }
          }
          if(f == 0)System.out.println("This is not a prime.");
          else System.out.println("This is a prime.");
        }
    }
}

The result of the code is the same but the result of OLE (timeout):

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n;
        n = in.nextInt();
        int i;
        if (n == 1)
            System.out.println("This is not a prime.");
        else if(n==2)
            System.out.println("This is a prime.");
        else {
          for(i=2;i<n;i++){
             if(n%i==0){
               System.out.println("This is not a prime.");
               break;
             }
            else{
                System.out.println("This is a prime.");
            }
          }
        }
    }
}