C Program to Print Hollow Star Pyramid

Program to print hollow star pyramid in c; Through this tutorial, we will learn how to print hollow star pyramid using for loop and while loop in c programs.

Programs to Print Hollow Star Pyramid in C

• C Program to Print Hollow Star Pyramid using For Loop
• C Program to Print Hollow Star Pyramid using While Loop

C Program to Print Hollow Star Pyramid using For Loop

#include<stdio.h>
int main()
{
 	int i, j, rows;
 	printf("Enter Hollow Star Pyramid Rows =  ");
 	scanf("%d", &rows);

    printf("Hollow Star Pyramid Pattern\n");
	for(i = 1; i <= rows; i++)
	{
		for(j = 1; j <= rows - i; j++)
		{
			printf(" ");
		}
        if(i == 1 || i == rows)
        {
            for(j = 1; j <= i * 2 - 1; j++)
            {
                printf("*");
            }
        }
        else
        {
            for(j = 1; j <= i * 2 - 1; j++)
            {
                if(j == 1 || j == i * 2 - 1)
                {
                    printf("*");
                }
                else
                {
                    printf(" ");
                }
            }
        }

		printf("\n");
	}

 	return 0;
}

The output of the above c program; as follows:

Enter Hollow Star Pyramid Rows =  5
Hollow Star Pyramid Pattern
    *
   * *
  *   *
 *     *
*********

C Program to Print Hollow Star Pyramid using While Loop

#include<stdio.h>
int main()
{
     int i, j, rows;
    char ch;

    printf("Symbol to Print as Hollow Star Pyramid =  ");
    scanf("%c", & ch);

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

    printf("Hollow Star Pyramid Pattern\n");
    i = 1;
    while( i <= rows)
    {
        j = 1;
        while( j <= rows - i)
        {
            printf(" ");
            j++;
        }
        if(i == 1 || i == rows)
        {
            j = 1;
            while( j <= i * 2 - 1)
            {
                printf("%c", ch);
                j++;
            }
        }
        else
        {
            j = 1;
            while(j <= i * 2 - 1)
            {
                if(j == 1 || j == i * 2 - 1)
                {
                    printf("%c", ch);
                }
                else
                {
                    printf(" ");
                }
                j++;
            }
        }
        printf("\n");
        i++;
    }

     return 0;
}

The output of the above c program; as follows:

Symbol to Print as Hollow Star Pyramid =  *
Enter Hollow Star Pyramid Rows =  5
Hollow Star Pyramid Pattern
    *
   * *
  *   *
 *     *
*********

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