output help

Hi my code does everything I want, I just need to add one thing if someone could please help. I need the program to calculate the average only when at least one number is entered and shows “goodbye” if no numbers are entered (the user enters a negative number for the first input). Right now it calculates the average but I need it to output "goodbye" if the first input is a negative number.

Code:

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import java.util.Scanner;

public class While {

  public static void main(String[] args) { 
    Scanner input = new Scanner(System.in);
       
    int num; //
    int numOfAmount = 0;
    float totalAmout = 0;    float average;   
    System.out.println("Enter a score or a negative number to end the program: "); //prompt the user for an input
    num = input.nextInt();
   
    while(num >= 0)
    {
    numOfAmount++; //
    totalAmount = totalAmount + score;
           
    System.out.println("Enter a number or a negative number to end the program: "); //
    num = input.nextInt();
    }
       
    average = totalAmount / numOfAmount; //calculate the average score
    System.out.println("The average score is " + average);
  }

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If the first value was a negative number then it would never enter your loop and thus 'totalAmout' would remain 0.

Code:

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if(totalAmout == 0){
  System.out.println("Goodbye");
}else{
      average = totalAmount / numOfAmount; //calculate the average score
    System.out.println("The average score is " + average);
}

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