C Program to Print Alphabet B Pattern

In this article, we will show how to write a C program to print the Alphabet B pattern or shape of stars using for loop, while loop, and functions.

#include <stdio.h>

int main()
{
    int rows;

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

	for (int i = 0 ; i < rows; i++ )
	{
		printf("*");
		for (int j = 0 ; j < 2 * rows - 1; j++ )
		{
			if ((i == 0 || i == rows - 1 || i == rows / 2) && (j < (2 * rows) - 2))
			{
				printf("*");
			}
			else if ((j == (2 * rows) - 2) &&  !(i == 0 || i == rows - 1 || i == rows / 2))
			{
				printf("*");
			}
			else
			{
				printf(" ");
			}

		}
		printf("\n");
	}

    return 0;
}

Enter Rows = 19
**********************
*                                    *
*                                    *
*                                    *
*                                    *
*                                    *
*                                    *
*                                    *
*                                    *
***********************
*                                    *
*                                    *
*                                    *
*                                    *
*                                    *
*                                    *
*                                    *
*                                    *
**********************

Instead of a for loop, this Alphabet B Pattern of stars program uses a while loop to iterate the rows and columns. For more star programs, click here.

#include <stdio.h>

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

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

    n =  rows / 2;

    i = 0 ;
	while (i < rows )
	{
		printf("*");
		j = 0 ;
		while (j <= rows )
		{
			if ((i == 0 || i == rows - 1 || i == n) && (j < n))
			{
				printf("*");
			}
			else if (j == n &&  !(i == 0 || i == rows - 1 || i == n))
			{
				printf("*");
			}
			else
			{
				printf(" ");
			}
			j++;

		}
		printf("\n");
		i++;
	}

    return 0;
}

Enter Rows = 13
****       
*      *       
*      *       
*      *       
*      *       
*      *       
****      
*      *       
*      *       
*      *       
*      *       
*      *       
****

In this C program, we create an alphabetBPat function that accepts those values and prints the Alphabet B shape or pattern of the given char.

#include <stdio.h>

void alphabetBPat(int rows, char a)
{
	for (int i = 0 ; i < rows; i++ )
		{
			printf("%c", a);
			for (int j = 0 ; j < 2 * rows - 1; j++ )
			{
				if ((i == 0 || i == rows - 1 || i == rows / 2) && (j < (2 * rows) - 2))
				{
					printf("%c", a);
				}
				else if ((j == (2 * rows) - 2) &&  !(i == 0 || i == rows - 1 || i == rows / 2))
				{
					printf("%c", a);
				}
				else
				{
					printf(" ");
				}

			}
			printf("\n");
		}
}

int main()
{
	int rows;
	char a;

	printf("Enter Alphabet =  ");
	scanf("%c", &a);

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

	alphabetBPat(rows, a);

    return 0;
}