C++ Program to Print Triangle of Alphabets in Reverse Pattern

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

#include<iostream>
using namespace std;

int main()
{
	int rows;

	cout << "Enter Triangle of Alphabets in Reverse Rows = ";
	cin >> rows;

	cout << "printing Triangle of Alphabets in Reverse Order\n";

	int alphabet = 65;

	for (int i = rows - 1; i >= 0; i--)
	{
		for (int j = 0; j < i; j++)
		{
			cout << " ";
		}
		for (int k = i; k <= rows - 1; k++)
		{
			cout << char(alphabet + k) << " ";
		}
		cout << "\n";
	}
}

C++ program to print the triangle of alphabets in reverse pattern using a while loop.

#include<iostream>
using namespace std;

int main()
{
	int rows, i, j, k, alphabet;
	
	cout << "Enter Triangle of Alphabets in Reverse Rows = ";
	cin >> rows;

	cout << "printing Triangle of Alphabets in Reverse Order\n";

	alphabet = 65;

	i = rows - 1;
	while (i >= 0)
	{

		j = 0;
		while (j < i)
		{
			cout << " ";
			j++;
		}

		k = i;
		while (k <= rows - 1)
		{
			cout << char(alphabet + k) << " ";
			k++;
		}
		cout << "\n";
		i--;
	}
}

Enter Triangle of Alphabets in Reverse Rows = 11
printing Triangle of Alphabets in Reverse Order
          K 
         J K 
        I J K 
       H I J K 
      G H I J K 
     F G H I J K 
    E F G H I J K 
   D E F G H I J K 
  C D E F G H I J K 
 B C D E F G H I J K 
A B C D E F G H I J K 

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

#include<iostream>
using namespace std;

int main()
{
	int rows, i, j, k, alphabet;
	
	cout << "Enter Triangle of Alphabets in Reverse Rows = ";
	cin >> rows;

	cout << "printing Triangle of Alphabets in Reverse Order\n";

	alphabet = 65;

	i = rows - 1;
	do
	{

		j = 0;
		do
		{
			cout << " ";

		} while (j++ < i);

		k = i;
		do
		{
			cout << char(alphabet + k) << " ";

		} while (++k <= rows - 1);

		cout << "\n";

	} while (--i >= 0);
}

Enter Triangle of Alphabets in Reverse Rows = 14
printing Triangle of Alphabets in Reverse Order
              N 
             M N 
            L M N 
           K L M N 
          J K L M N 
         I J K L M N 
        H I J K L M N 
       G H I J K L M N 
      F G H I J K L M N 
     E F G H I J K L M N 
    D E F G H I J K L M N 
   C D E F G H I J K L M N 
  B C D E F G H I J K L M N 
 A B C D E F G H I J K L M N