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Thread: How do I connect 2 method headers to make it recursive???

  1. #1
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    Default How do I connect 2 method headers to make it recursive???

    When my main method asks for a number, I want that number to be the value of printArray(int a). So the number I enter will run off the script that the printArray method has.

    A good website example would be nice. I keeping getting the n! = n * (n-1)! type of results but that's not exactly the type of recursion i am looking for.

     import java.util.*;
    public class InputLoop 
    {
        public static int printArray(int a)
        {
            if (a < 20 || a > 80) 
            {
                System.out.println("Error");
            }
            else if (a >= 20 && a <= 80) 
                System.out.println(a);
            return a;
        }
     
        public static void main(String[] args) 
        {
            Scanner number = new Scanner(System.in);
            System.out.println("Enter a number between 20 and 80");
            int a = number.nextInt();
        }
    }


  2. #2
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    Default Re: How do I connect 2 method headers to make it recursive???

    From my understanding of the question you want to read in a number between 20 and 80 and print out all integers between that number and 80.

    -Your computer only executes code that is in the main method so unless you make a reference to the method printArray[] it will never execute that code.
    -It would be possible to write this program recursively but it isn't necessary a simple while loop will do. However if you really want to do it recursively you will need to learn about recursion first.

    This book: Javanotes 6.0 -- Title Page will give you the basics of recursion.

    If you need any more help just ask.

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