C Program to Print Right Triangle Characters Pattern

Write a C program to print right triangle characters pattern or alphabets pattern using for loop.

#include <stdio.h>

int main()
{
	int rows;

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

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

	for (int i = 1; i <= rows; i++)
	{
		for (int j = 0; j <= (2 * i - 2); j++)
		{
			printf("%c ", alphabet + j);
		}
		printf("\n");
	}
}

This program prints the right angled triangle pattern of characters using a while loop.

#include <stdio.h>

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

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

	printf("Right Angled Triangle of Characters Pattern\n");
	alphabet = 65;
	i = 1;

	while (i <= rows)
	{
		j = 0;
		while (j <= (2 * i - 2))
		{
			printf("%c ", alphabet + j);
			j++;
		}
		printf("\n");
		i++;
	}
}

Enter Right Triangle of Characters Rows = 14
Right Angled Triangle of Characters Pattern
A 
A B C 
A B C D E 
A B C D E F G 
A B C D E F G H I 
A B C D E F G H I J K 
A B C D E F G H I J K L M 
A B C D E F G H I J K L M N O 
A B C D E F G H I J K L M N O P Q 
A B C D E F G H I J K L M N O P Q R S 
A B C D E F G H I J K L M N O P Q R S T U 
A B C D E F G H I J K L M N O P Q R S T U V W 
A B C D E F G H I J K L M N O P Q R S T U V W X Y 
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [

This example uses the do while loop to print the right angled triangle characters pattern.

#include <stdio.h>

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

	printf("Enter Rows = ");
	scanf("%d", &rows);

	printf("Right Angled Triangle of Characters Pattern\n");
	alphabet = 65;
	i = 1;

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

		} while (++j <= (2 * i - 2));
		printf("\n");

	} while (++i <= rows);
}

Enter Rows = 17
Right Angled Triangle of Characters Pattern
A 
A B C 
A B C D E 
A B C D E F G 
A B C D E F G H I 
A B C D E F G H I J K 
A B C D E F G H I J K L M 
A B C D E F G H I J K L M N O 
A B C D E F G H I J K L M N O P Q 
A B C D E F G H I J K L M N O P Q R S 
A B C D E F G H I J K L M N O P Q R S T U 
A B C D E F G H I J K L M N O P Q R S T U V W 
A B C D E F G H I J K L M N O P Q R S T U V W X Y 
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ 
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ] 
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ] ^ _ 
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ] ^ _ ` a