How to add a loop?

Question

Java

Hello.
For the university I do D / Z. It is necessary to write a program for reading numbers for simplicity.
Here's what happened:

/* package codechef; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;


class Codechef
{
  public static void main (String[] args) throws java.lang.Exception
  {
            Scanner scan = new Scanner(System.in); 
            System.out.println("Enter a number: "); 
            int input = scan.nextInt(); 
            boolean prime = true; 
            for (int i = 2; i<input; i++){ 
            if(input % i==0){ 
            prime = false; 
            } 
            } 
            if(prime==false){ 
            System.out.println(input + " is not prime"); 
            } 
            else if(prime==true){ 
            System.out.println(input + " is prime");
  }
}
}

When I enter 1, it says to me that it is simple. But as far as I know, 1 is neither prime nor compound.
1. How can I add an "exception" for 1, so that when you enter it, it says that it is neither simple nor compound?
2. Do I need to create a separate cycle for it?

Answer 1

At you from infinity of variants one case is not processed. Why loop over one value when you know it's one? Make an exception, of course.