C Program to Print Alphabet M Pattern

In this article, we will show how to write a C program to print the Alphabet M 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 ((j == rows) || (j == i && j < rows / 2)
					|| (j == rows - i - 1 && j > rows / 2))
			{
				printf("*");
			}
			else
			{
				printf(" ");
			}
		}
		printf("\n");
	}
	return 0;
}

Enter Rows = 18
**                **
* *              * *
*  *            *  *
*   *          *   *
*    *        *    *
*     *      *     *
*      *    *      *
*       *  *       *
*        *         *
*                  *
*                  *
*                  *
*                  *
*                  *
*                  *
*                  *
*                  *
*                  *

Instead of a for loop, this Alphabet M 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 Rows = ");
	scanf("%d", &rows);

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

Enter Rows = 15
**             **
* *           * *
*  *         *  *
*   *       *   *
*    *     *    *
*     *   *     *
*      * *      *
*               *
*               *
*               *
*               *
*               *
*               *
*               *
*               *

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

#include <stdio.h>

void alphabetMPat(int rows, char a) 
{
	for (int i = 0; i < rows; i++) 
	{
		printf("%c", a);
		for (int j = 0; j <= rows; j++) 
		{
			if ((j == rows) || (j == i && j < rows / 2)
					|| (j == rows - i - 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);

	alphabetMPat(rows, a);
	return 0;
}