Pascal's triangle 2d array - formatting printed output

Question

I have a small assignment where I have to use a 2d array to produce Pascal\'s triangle. Here is my code, and it works. there is an extra credit opportunity if I display the

Answer 1

Here I had modified your code, it prints wonderfully for ROW size till 13, coz of the limitation of my console window.

import java.util.*; 

public class Pascal { 
    public static final int ROW = 12;
    private static int max = 0;

    public static void main(String[] args) { 
        int[][] pascal  = new int[ROW +1][];
        pascal[1] = new int[1 + 2];
        pascal[1][1] = 1;
        for (int i = 2; i <= ROW; i++) {
            pascal[i] = new int[i + 2];
            for (int j = 1; j < pascal[i].length - 1; j++) {
                pascal[i][j] = pascal[i-1][j-1] + pascal[i-1][j];
                String str = Integer.toString(pascal[i][j]);
                int len = str.length();
                if (len > max)
                    max = len;
            }
        }


        for (int i = 1; i <= ROW; i++) {                
            for (int k = ROW; k > i; k--)
                System.out.format("%-" + max + "s", " ");
            for (int j = 1; j < pascal[i].length - 1; j++)                      
                System.out.format("%-" + (max + max) + "s",  pascal[i][j]);
            System.out.println();
        }
    }
}

Hopefully this might help.

Regards