Java Program to Print Right Triangle of Alphabets in Reverse

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

package Alphabets;

import java.util.Scanner;

public class RightTriAlpRev1 {
	
	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);	
		
		System.out.print("Enter Right Triangle Reverse Characters Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Right Triangle of Characters in Reverse Pattern");
		int alphabet = 65;
		
		for (int i = rows - 1; i >= 0; i-- ) 
		{
			for (int j = rows - 1; j >= i; j-- ) 	
			{
				System.out.print((char)(alphabet + j) + " ");
			}
			System.out.println();
		}
	}
}

This Java pattern program prints the right angled triangle of alphabets in reverse order or descending order using while loop.

package Alphabets;

import java.util.Scanner;

public class RightTriAlpRev2 {
	
	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);	
		
		System.out.print("Enter Right Triangle Reverse Characters Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Right Triangle of Characters in Reverse Pattern");
		int alphabet = 65;
		int j, i = rows - 1;
		
		while( i >= 0) 
		{
			j = rows - 1;
			while(j >= i) 	
			{
				System.out.print((char)(alphabet + j) + " ");
				j--;
			}
			System.out.println();
			i--;
		}
	}
}

Enter Right Triangle Reverse Characters Rows = 19
Right Triangle of Characters in Reverse Pattern
S 
S R 
S R Q 
S R Q P 
S R Q P O 
S R Q P O N 
S R Q P O N M 
S R Q P O N M L 
S R Q P O N M L K 
S R Q P O N M L K J 
S R Q P O N M L K J I 
S R Q P O N M L K J I H 
S R Q P O N M L K J I H G 
S R Q P O N M L K J I H G F 
S R Q P O N M L K J I H G F E 
S R Q P O N M L K J I H G F E D 
S R Q P O N M L K J I H G F E D C 
S R Q P O N M L K J I H G F E D C B 
S R Q P O N M L K J I H G F E D C B A 

This Java example uses the do while loop to display the right angled triangle pattern of alphabets in reverse order.

package Alphabets;

import java.util.Scanner;

public class RightTriAlpRev3 {
	
	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);	
		
		System.out.print("Enter Right Triangle Reverse Characters Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Right Triangle of Characters in Reverse Pattern");
		int alphabet = 65;
		int j, i = rows - 1;
		
		do
		{
			j = rows - 1;
			do  	
			{
				System.out.print((char)(alphabet + j) + " ");

			} while(--j >= i);
			System.out.println();
		} while(--i >= 0);
	}
}

Enter Right Triangle Reverse Characters Rows = 15
Right Triangle of Characters in Reverse Pattern
O 
O N 
O N M 
O N M L 
O N M L K 
O N M L K J 
O N M L K J I 
O N M L K J I H 
O N M L K J I H G 
O N M L K J I H G F 
O N M L K J I H G F E 
O N M L K J I H G F E D 
O N M L K J I H G F E D C 
O N M L K J I H G F E D C B 
O N M L K J I H G F E D C B A