C Program to Print Downward Triangle Alphabets Pattern

Write a C program to print downward triangle alphabets pattern using for loop.

#include <stdio.h>

int main()
{
	int rows, alphabet = 65;

	printf("Enter Downward Triangle of Alphabets Rows = ");
	scanf("%d", &rows);

	printf("Printing Downward Triangle of Alphabets Pattern\n");
	for (int i = 0; i <= rows - 1; i++)
	{
		for (int j = rows - 1; j >= i; j--)
		{
			printf("%c ", alphabet + j);
		}
		printf("\n");
	}
}
C Program to Print Downward Triangle Alphabets Pattern

This C example prints the downward triangle pattern of alphabets using a while loop.

#include <stdio.h>

int main()
{

	int i, j, rows, alphabet = 65;

	printf("Enter Downward Triangle of Alphabets Rows = ");
	scanf("%d", &rows);

	printf("Printing Downward Triangle of Alphabets Pattern\n");

	i = 0;
	while (i <= rows - 1)
	{
		j = rows - 1;
		while (j >= i)
		{
			printf("%c ", alphabet + j);
			j--;
		}
		printf("\n");
		i++;
	}
}
Enter Downward Triangle of Alphabets Rows = 10
Printing Downward Triangle of Alphabets Pattern
J I H G F E D C B A 
J I H G F E D C B 
J I H G F E D C 
J I H G F E D 
J I H G F E 
J I H G F 
J I H G 
J I H 
J I 
J 

This C program uses the do while loop to display the downward triangle pattern of alphabets.

#include <stdio.h>

int main()
{

	int i, j, rows, alphabet = 65;

	printf("Enter Downward Triangle of Alphabets Rows = ");
	scanf("%d", &rows);

	printf("Printing Downward Triangle Alphabets Pattern\n");

	i = 0;
	do
	{
		j = rows - 1;
		do
		{
			printf("%c ", alphabet + j);

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

	} while (++i <= rows - 1);
}
Enter Downward Triangle of Alphabets Rows = 16
Printing Downward Triangle Alphabets Pattern
P O N M L K J I H G F E D C B A 
P O N M L K J I H G F E D C B 
P O N M L K J I H G F E D C 
P O N M L K J I H G F E D 
P O N M L K J I H G F E 
P O N M L K J I H G F 
P O N M L K J I H G 
P O N M L K J I H 
P O N M L K J I 
P O N M L K J 
P O N M L K 
P O N M L 
P O N M 
P O N 
P O 
P

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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.