Java Program to Print Downward Pyramid Number Pattern 2

Java Program to Print Number Pattern Downward Pyramid

Last Updated: 19 July, 2022

On this tutorial page, we are going to learn how to write a Java program to print the left pascel triangle star pattern.

A pattern program is composed of multiple for-loops and print statements.

Let's see the Java Program Implementation.

  public class Pattern17 {
    public static void main(String[] args) {
  
      int row, column, numberOfRows = 5, num = 1;
  
      // Step 1: printing top pyramid
      // outer loop for number of rows
      for (row = 1; row <= numberOfRows; row++) {
        // inner loop for number of columns to print spaces
        for (column = numberOfRows; column > row; column--) {
          System.out.print(" ");
        }
        // inner loop for number of columns to print numbers
        for (column = 0; column < row * 2 - 1; column++) {
          System.out.print(num++);
        }
        num = 1;
        // line break
        System.out.println();
      }
  
      // Step 2: now, printing downward pyramid
      // outer loop for number of rows
      for (row = 1; row <= numberOfRows - 1; row++) {
        // inner loop for number of columns to print spaces
        for (column = 0; column < row; column++) {
          System.out.print(" ");
        }
        // inner loop for number of columns to print numbers
        for (column = (numberOfRows - row) * 2 - 1; column > 0; column--) {
          System.out.print(num++);
        }
        num = 1;
        // line break
        System.out.println();
      }
    }
  }

Output

1 123 12345 1234567 123456789 1234567 12345 123 1