# Need help on the pyramid number!

• October 14th, 2011, 03:43 PM
nicetan
Need help on the pyramid number!
Write a program that displays a pyramid pattern. Use a nested for the loop that prints the following output:
http://i1009.photobucket.com/albums/...n/project1.jpg
Hint
Here is the pseudo code solution:
for the row from 0 to 7 {
// Pad leading blanks in a row using a loop like this
for the column from 1 to 7 - row
System.out.print(" ");

// Print left half of the row for numbers 1, 2, 4, up to 2^row using a look like this:
for the column from 0 to row
System.out.print(" " + (int)Math.pow(2, column));

// Print the right half of the row for numbers 2^(row-1),2^(row-2), ..., 1
using a loop like this
for (int column = row - 1; column >= 0; column--)
System.out.print(" " + number = (int)Math.pow(2, column));

// Start a new line
System.out.print('\n');
}

```import javax.swing.JOptionPane;   public class PyramidProject1_TanNguyen {   public static void main(String[] args) {     for (int row = 0; row <= 7; row++) {   for (int column = 1; column <= 7 - row; column++) System.out.print("___");   for (int num = row; num >= row; num--) System.out.print(" " + (int)Math.pow(2, row-7)); System.out.print(" " + (int)Math.pow(2, row-6)); System.out.print(" " + (int)Math.pow(2, row-5)); System.out.print(" " + (int)Math.pow(2, row-4)); System.out.print(" " + (int)Math.pow(2, row-3)); System.out.print(" " + (int)Math.pow(2, row-2)); System.out.print(" " + (int)Math.pow(2, row-1)); System.out.print(" " + (int)Math.pow(2, row));   for (int column = row-1; column >= 0; column--) System.out.print(" " + (int)Math.pow(2, column));   System.out.println(); } } }```