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

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

Logic to print hollow pyramid star design ( equilateral triangle star blueprint)

  • Enter the row value for the equilateral triangle.
  • Hither I have used three loops i is the outer loop to alter the line and two inner loops to print star and space.
  • The outer loop iterate row times and print a newline afterwards completing the inner loop.
  • First inner loop impress the infinite 10 to (N-one)(where N is the row number and ten is the current row number).
  • The 2d inner loop print the star at xth or terminal column or for terminal row. Information technology iterates from one to (two*x)-1).

Run into the, C program to print hollow pyramid star pattern:

#include <stdio.h>  int main() {     int x = 0,y = 0;     unsigned int rows = 0;      printf("Enter the number of rows = ");     scanf("%u",&rows);      for(10=ane; x<=rows; ++x)     {         // Print spaces         for(y=10; y<=rows; ++y)         {             printf(" ");         }         for(y =ane; y<=((2*ten)-ane); ++y)         {             //Impress star only first and last row col             if(x==rows || y==one || y==((two*x)-1))             {                 printf("*");             }             else             {                 printf(" ");             }         }         // Print new line         printf("\n");     }     return 0; }

Output:

C program to print hollow pyramid

Code Analysis:

It asks the user to enter the row for the hollow pyramid (equilateral triangle).

printf("Enter the number of rows = "); scanf("%u",&rows)

commencement, inner loop print space x to (Northward-i) times.

// Print spaces   for(y=x; y<=rows; ++y)   {       printf(" ");   }

The second inner loop print the star at x-th or final column or for the concluding row otherwise it prints space.