Printing a checker board with nested loops. [Java]

I'm having issues with getting my code to print. I need to print a checker board with a grid the size of a user input.

Ex. Checker Board with a grid of 5

Here's my code:

import java.util.Scanner;
public class nestedpractice1 
{
    public static void main(String[] args)
    {
        Scanner kbinput = new Scanner(System.in); 
        //Create Size variable
        System.out.println("Input a size: ");
        int n = 0; n = kbinput.nextInt();

        for(int r = 0; r < n; r++)
        {
            for(int c = 0; c < r; c++)
                    {
                if((r%2) == 0)
                {
                    System.out.print("*");
                }
                else if((r%1) == 0)
                {
                    System.out.print(" *");
                }
            }
            System.out.println("");
            kbinput.close();
        }
    }
}