How to print every other number?

Question

I am new to java, just started learning the basics concepts of it, I am now trying to develop a program where users enter two numbers and the program prints every other number between these two numbers, I have tried several methods but I just can grasp how to do it, I know this might seem really easy, but I have been spending the past two days trying to figure it out with no luck at all. I would really appreciate any help. I manage to write the code enabling the inputs of values but after that, it is just blank, and I am not able to proceed:/

This is how far I came with my code which is probably way off.

public class EveryOther {
  public static void main(String[] args) {

    int FirstNumber = 0;
    int SecondNumber = 0;

    Scanner scanner = new Scanner(System.in);
    System.out.print("FirstNumber: " );
    scanner.nextInt();

    Scanner scanner2 = new Scanner(System.in);
    System.out.print("Second Number: ");
    scanner.nextInt(); {

        while (FirstNumber <= SecondNumber + 2);
        System.out.println(SecondNumber * FirstNumber +2);
        SecondNumber++;

    }
}

Answer 1

1. FirstNumber and SecondNumber are assigned to 0, but we actually want to get it assigned from Scanner. here are some useful examples. https://www.w3schools.com/java/java_user_input.asp

2. the while loop does nothing because the conditional code is an empty statement. the link might be very helpful. https://www.tutorialspoint.com/java/java_while_loop.htm

   import java.util.Scanner;
   
   public class EveryOther {
   
       public static void main(String[] args) {
   
           int FirstNumber = 0;
           int SecondNumber = 0;
   
           Scanner scanner = new Scanner(System.in);
           System.out.print("FirstNumber: " );
           FirstNumber = scanner.nextInt();
   
           System.out.print("Second Number: ");
           SecondNumber = scanner.nextInt();
   
           while (FirstNumber < SecondNumber){
               System.out.println(FirstNumber);
               FirstNumber = FirstNumber + 2;
           }
       }
   

   }

Answer 2

So suppose you have your firstNumber = 5 and secondNumber = 10 then every other number starting from firstNumber in this case will be 5,7,9 that means you just have to increase firstNumber's value by 2 in every iteration of loop. It can be done as follows:

while (firstNumber < secondNumber ){
        System.out.println(firstNumber );
        firstNumber = firstNumber + 2;
}

Hope it helps you understand.