how to get average of 3 numbers in java WITHOUT RETURN code example

Example: Java program to calculate average of 3 numbers

// Java program to calculate average of 3 numbers
import java.util.Scanner;
public class AverageNumberDemo 
{
   public static void main(String[] args) 
   {
      Scanner sc = new Scanner(System.in);
      System.out.print("Please enter first number: ");
      double number1 = sc.nextDouble();
      System.out.print("Please enter second number: ");
      double number2 = sc.nextDouble();
      System.out.print("Please enter third number: ");
      double number3 = sc.nextDouble();
      System.out.print("The average of 3 numbers is: " + calculateAverage(number1, number2, number3));
      sc.close();
   }
   public static double calculateAverage(double num1, double num2, double num3)
   {
      return (num1 + num2 + num3) / 3;
   }
}