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. For more Alphabet examples, refer to the Java Alphabet Pattern Programs article.

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 Java 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

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