Java Program to Print Reverse Pyramid Star Pattern

In this article, you will learn how to write a java program to print reverse Pyramid Star Pattern.

This is how a reverse pyramid pattern using stars looks:

Number of rows = 7

Output:

* * * * * * * *
 * * * * * * *
  * * * * * *
   * * * * *
    * * * *
     * * *
      * *
       *

Example 1: Program to Print Reverse Pyramid Pattern

public class JavaExample
{
  public static void main(String[] args)
  {
    int numberOfRows=7;
    //This loop runs based on the number of rows
    //In this case, the loop runs 7 times to print 7 rows
    for (int i= 0; i<= numberOfRows-1; i++)
    {

      //This loop prints starting spaces for each row of pattern
      for (int j=0; j<=i; j++)
      {
        System.out.print(" ");
      }
      //This loop prints stars and the space between stars for each row
      for (int k=0; k<=numberOfRows-1-i; k++)
      {
        System.out.print("*" + " ");
      }
      //To move the cursor to new line after each row
      System.out.println();
    }
  }
}  

Output:

Example 2: Program to Print Reverse Pyramid Pattern based on user input

In the following program, the number of rows is entered by the user and the program gets that value using Scanner. The value then used by for loop to print the pattern consisting user entered number of rows.

import java.util.Scanner;
public class JavaExample
{
  public static void main(String[] args)
  {
    int numberOfRows;
    System.out.println("Enter Number of rows: ");
    //Getting the number of rows input from user
    Scanner sc = new Scanner(System.in);
    numberOfRows = sc.nextInt();
    sc.close();

    //This loop will run based on the input by user
    //if user enters 5 then the loop will run 5 times
    //if user enters 8 then the loop will run 8 times
    for (int i= 0; i<= numberOfRows-1; i++)
    {

      //Print spaces before first star of each row
      for (int j=0; j<=i; j++)
      {
        System.out.print(" ");
      }
      //Print stars and spaces between them
      for (int k=0; k<=numberOfRows-1-i; k++)
      {
        System.out.print("*" + " ");
      }
      //new line for each row
      System.out.println();
    }
  }
}  

Output: User enters number 8 so the program prints 8 rows reverse pyramid pattern.

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