C Program to Print Triangle of Same Alphabets Pattern

Write a C program to print a triangle pattern of the same alphabets in each row using for loop.

#include <stdio.h>

int main()
{
	int rows;

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

	printf("Printing Triangle of Same Alphabets in each Row\n");

	int alphabet = 65;

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

This C pattern example prints the triangle of the same alphabet in every single row using a while loop.

#include <stdio.h>

int main()
{
	int rows, i, j, k, alphabet;
	
	printf("Enter Rows = ");
	scanf("%d", &rows);

	printf("\n");

	alphabet = 65;

	i = 0;
	while (i <= rows - 1)
	{
		j = rows - 1;
		while (j > i)
		{
			printf(" ");
			j--;
		}

		k = 0;
		while (k <= i)
		{
			printf("%c ", alphabet + i);
			k++;
		}

		printf("\n");
		i++;
	}
}
Enter Rows = 13

            A 
           B B 
          C C C 
         D D D D 
        E E E E E 
       F F F F F F 
      G G G G G G G 
     H H H H H H H H 
    I I I I I I I I I 
   J J J J J J J J J J 
  K K K K K K K K K K K 
 L L L L L L L L L L L L 
M M M M M M M M M M M M M 

C Program to Print Triangle of Same Alphabets Pattern using a do while loop.

#include <stdio.h>

int main()
{
	int rows, i, j, k, alphabet = 65;
	
	printf("Enter Rows = ");
	scanf("%d", &rows);

	printf("\n");

	i = 0;
	do
	{
		j = rows - 1;
		do
		{
			printf(" ");

		} while (j-- > i);

		k = 0;
		do
		{
			printf("%c ", alphabet + i);

		} while (++k <= i);

		printf("\n");

	} while (++i <= rows - 1);
}
Enter Rows = 15

               A 
              B B 
             C C C 
            D D D D 
           E E E E E 
          F F F F F F 
         G G G G G G G 
        H H H H H H H H 
       I I I I I I I I I 
      J J J J J J J J J J 
     K K K K K K K K K K K 
    L L L L L L L L L L L L 
   M M M M M M M M M M M M M 
  N N N N N N N N N N N N N N 
 O O O O O O O O O O O O O O O

About Suresh

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.