C program to print hollow pyramid (Equilateral triangle) star pattern

belongs to collection: C Programs to print Series

YasminRadwan26

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2022-06-22

257

In this exercise, I will show you, How to write a C program to print hollow pyramid star pattern or hollow equilateral triangle star pattern series of n rows using for loop. How to print hollow pyramid star pattern in C programming. Here, one thing is important to know that the rows of the pyramid.

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YasminRadwan26

2022-06-22

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#include <stdio.h>
int main()
{
    int x = 0,y = 0;
    unsigned int rows = 0;
    printf("Enter the number of rows = ");
    scanf("%u",&rows);
    for(x=1; x<=rows; ++x)
    {
        // Print spaces
        for(y=x; y<=rows; ++y)
        {
            printf(" ");
        }
        for(y =1; y<=((2*x)-1); ++y)
        {
            //Print star only first and last row col
            if(x==rows || y==1 || y==((2*x)-1))
            {
                printf("*");
            }
            else
            {
                printf(" ");
            }
        }
        // Print new line
        printf("\n");
    }
    return 0;
}

Output: