Pascals Triangle Recursion

//********************************************************************************/
//File Name: PascalsTriangle.java                       Author: Justin Trubela    /
//Section: 03                                                                     /
//                                                                                /
//Purpose:  Write a program using recursion. The program asks the user to input   /
//an integer n and calculates n many rows of Pascals triangle                     /
//********************************************************************************/
import java.util.Scanner;

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

        Scanner scan = new Scanner(System.in);

        //not entirely n-th but its a start based on the string of spaces i'm breaking up soon
        System.out.println("Enter a number from 1 to 9: ");

        //scan in the n-th row from user
        int input = scan.nextInt();
        while(input<=0 || input>=10) {
            System.out.println("not in the assigned range");
            System.out.println("Enter a number from 1 to 9: ");


            input = scan.nextInt();

        }


        System.out.println("Pascals Triangle:");

        //Recursive function
        printTriangle(input);
    }


    public static void printTriangle(int n) {

        /*could probably put this is an array and have it iterate n/2 times each row to compensate printed number difference */
        String spaces = "                                "; // sets up the spaces on the left of triangle(32 spaces to be exact)
        int spacesLength = spaces.length();

        //iterate through for each row of the triangle
        for (int i = 0; i < n; i++) {
            for (int j = 0; j <= i; j++) {

                System.out.print(" " + pascalsTriangle(i, j) + "  ");
            }
            System.out.println();

            System.out.print(spaces.substring(0, spacesLength/2));
            /*as it iterates chop off 4 more spaces from the string so that it becomes shorter*/
            spacesLength=spacesLength-4;
        }
    }

    public static int pascalsTriangle(int i, int j) {
        if (i==0) /*center the first 1*/{


            /*same thing here with utilizing n/2 spaces to compensate the difference*/
            System.out.print("                  ");
        }

        //
        if (j == 0 || j == i) {
            return 1;
        }
        else {
            return pascalsTriangle(i - 1, j - 1) + pascalsTriangle(i - 1, j);
        }
    }
}