Java Program to Print Triangle of Alphabets in Reverse Pattern

Write a Java program to print triangle of alphabets in reverse pattern using for loop.

package Alphabets;
import java.util.Scanner;

public class TriangleAlpReverse1 {
	
	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);	
		
		System.out.print("Enter Triangle of Alphabets in Reverse Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Triangle of Alphabets in Reverse Order");
		
		int alphabet = 65;
		
		for (int i = rows - 1; i >= 0; i--) 
		{
			for (int j = 0; j < i; j++ ) 	
			{
				System.out.print(" ");
			}
			for(int k = i; k <= rows - 1; k++)
			{
				System.out.print((char)(alphabet + k) + " ");
			}
			System.out.println();
		}
	}
}
Java Program to Print Triangle of Alphabets in Reverse Pattern

Java program to print triangle pattern of alphabets in reverse order using a while loop.

package Alphabets;

import java.util.Scanner;

public class TriangleAlpReverse2 {
	
	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);	
		
		System.out.print("Enter Triangle of Alphabets in Reverse Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Triangle of Alphabets in Reverse Order");
		
		int i, j, k, alphabet = 65;
		
		i = rows - 1;
		while(i >= 0) 
		{
			
			j = 0;
			while( j < i ) 	
			{
				System.out.print(" ");
				j++;
			}
			
			k = i;
			while(k <= rows - 1)
			{
				System.out.print((char)(alphabet + k) + " ");
				k++;
			}
			
			System.out.println();
			i--;
		}
	}
}
Enter Triangle of Alphabets in Reverse Rows = 13
Printing Triangle of Alphabets in Reverse Order
            M 
           L M 
          K L M 
         J K L M 
        I J K L M 
       H I J K L M 
      G H I J K L M 
     F G H I J K L M 
    E F G H I J K L M 
   D E F G H I J K L M 
  C D E F G H I J K L M 
 B C D E F G H I J K L M 
A B C D E F G H I J K L M 

This Java pattern example prints the triangle of alphabets in descending order or reverse order using the do while loop.

package Alphabets;

import java.util.Scanner;

public class TriangleAlpReverse3 {
	
	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);	
		
		System.out.print("Enter Triangle of Alphabets in Reverse Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Triangle of Alphabets in Reverse Order");
		
		int i, j, k, alphabet = 65;
		
		i = rows - 1;
		do 
		{
			
			j = 0;
			do	
			{
				System.out.print(" ");
				
			} while( j++ < i ) ;
			
			k = i;
			do
			{
				System.out.print((char)(alphabet + k) + " ");

			} while(++k <= rows - 1);
			
			System.out.println();

		} while(--i >= 0);
	}
}
Enter Triangle of Alphabets in Reverse Rows = 16
Printing Triangle of Alphabets in Reverse Order
                P 
               O P 
              N O P 
             M N O P 
            L M N O P 
           K L M N O P 
          J K L M N O P 
         I J K L M N O P 
        H I J K L M N O P 
       G H I J K L M N O P 
      F G H I J K L M N O P 
     E F G H I J K L M N O P 
    D E F G H I J K L M N O P 
   C D E F G H I J K L M N O P 
  B C D E F G H I J K L M N O P 
 A B C D E F G H I J K L M N O P 

About Suresh

Suresh is the founder of TutorialGateway and a freelance software developer. He specialized in Designing and Developing Windows and Web applications. The experience he gained in Programming and BI integration, and reporting tools translates into this blog. You can find him on Facebook or Twitter.