C Program to Print Right Triangle of Alphabets in Reverse

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

#include <stdio.h>

int main()
{
	int rows;

	printf("Enter Right Triangle Reverse Characters Rows = ");
	scanf("%d", &rows);

	printf("Right Triangle of Characters in Reverse Pattern\n");
	int alphabet = 65;

	for (int i = rows - 1; i >= 0; i--)
	{
		for (int j = rows - 1; j >= i; j--)
		{
			printf("%c ", alphabet + j);
		}
		printf("\n");
	}
}

This pattern example uses a while loop to print the right angled triangle of alphabets in reverse or descending order.

#include <stdio.h>

int main()
{
	int i, j, alphabet, rows;

	printf("Enter Right Triangle Reverse Characters Rows = ");
	scanf("%d", &rows);

	printf("Right Triangle of Characters in Reverse Pattern\n");
	alphabet = 65;
	i = rows - 1;

	while (i >= 0)
	{
		j = rows - 1;
		while (j >= i)
		{
			printf("%c ", alphabet + j);
			j--;
		}
		printf("\n");
		i--;
	}
}

Enter Right Triangle Reverse Characters Rows = 17
Right Triangle of Characters in Reverse Pattern
Q 
Q P 
Q P O 
Q P O N 
Q P O N M 
Q P O N M L 
Q P O N M L K 
Q P O N M L K J 
Q P O N M L K J I 
Q P O N M L K J I H 
Q P O N M L K J I H G 
Q P O N M L K J I H G F 
Q P O N M L K J I H G F E 
Q P O N M L K J I H G F E D 
Q P O N M L K J I H G F E D C 
Q P O N M L K J I H G F E D C B 
Q P O N M L K J I H G F E D C B A 

This C program uses the do while loop to print the right angled triangle pattern of alphabets in reverse order.

#include <stdio.h>

int main()
{
	int i, j, alphabet, rows;

	printf("Enter Right Triangle Reverse Characters Rows = ");
	scanf("%d", &rows);

	printf("Right Triangle of Characters in Reverse Pattern\n");
	alphabet = 65;
	i = rows - 1;

	do
	{
		j = rows - 1;
		do
		{
			printf("%c ", alphabet + j);

		} while (--j >= i);
		printf("\n");
	} while (--i >= 0);
}

Enter Right Triangle Reverse Characters Rows = 14
Right Triangle of Characters in Reverse Pattern
N 
N M 
N M L 
N M L K 
N M L K J 
N M L K J I 
N M L K J I H 
N M L K J I H G 
N M L K J I H G F 
N M L K J I H G F E 
N M L K J I H G F E D 
N M L K J I H G F E D C 
N M L K J I H G F E D C B 
N M L K J I H G F E D C B A