Simple2Code

Right Triangle Pattern of Numbers in Java with Repeating Pattern (Mirror image)

Written by

admin

in

In this tutorial, we will write a program to print a triangle pattern in java where the pattern is repeated on each row and keep on increasing. Before that, you may go through the following topic in java.

Example:

Input: 5
1
1 2 1
1 2 3 2 1
1 2 3 4 3 2 1

The program takes the user input for the number of rows and displays the result using the for loop in java. The program is mirror right angled triangle pattern with a repetition pattern or you can say half pyramid of numbers with a repetition pattern.

Java Program to print the right triangle number pattern

import java.util.Scanner;

public class Main
{
  public static void main(String[] args)
  {
    int rows;
    Scanner sc = new Scanner(System.in);

    System.out.print("Enter the number of rows: ");
    rows = sc.nextInt();

    for (int i = 1; i <= rows; i++)
    {
      //first half of the row            
      for (int j = 1; j <= i; j++)
        System.out.print(j + " ");

      //second half of the row              
      for (int j = i - 1; j >= 1; j--)
        System.out.print(j + " ");

      System.out.println();
    }
  }
}

Output:

Enter the number of rows: 5
1
1 2 1
1 2 3 2 1
1 2 3 4 3 2 1
1 2 3 4 5 4 3 2 1
1 2 3 4 5 6 5 4 3 2 1

More posts