C Program to Print Alphabet D Pattern

In this article, we will show how to write a C program to print the Alphabet D 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 < rows; j++ )
		{
			if ((i == 0 || i == rows - 1 ) && (j < rows - 2))
			{
				printf("*");
			}
			else if (i != 0 && i != rows - 1 && j == rows - 2)
			{
				printf("*");
			}
			else
			{
				printf(" ");
			}

		}
		printf("\n");
	}

    return 0;
}
Enter Rows = 15
**************  
*             * 
*             * 
*             * 
*             * 
*             * 
*             * 
*             * 
*             * 
*             * 
*             * 
*             * 
*             * 
*             * 
**************

Instead of a for loop, this Alphabet D 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 i, j, rows;

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

    i = 0;
    while (i < rows)
    {
    	if  (i > 0 && i < rows -  1)
    	{
    		printf("*");
    	}
    	j = 0;
        while ( j < rows / 2)
        {
        	if ((i == 0 || i == rows - 1 || j == rows / 2 - 1))
        	{
        		printf("*");
        	}
			else
			{
				printf(" ");
			}
        	j++;
        }
        printf("\n");
        i++;
    }

    return 0;
}
Enter the value = 14
*******
*      *
*      *
*      *
*      *
*      *
*      *
*      *
*      *
*      *
*      *
*      *
*      *
*******

In this C program, we create an alphabetDPat function that accepts those values and prints the Alphabet D Pattern of the given char.

#include <stdio.h>

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

	alphabetDPat(rows, a);

    return 0;
}
C Program to Print Alphabet D Pattern