C++ program to print star pyramid patterns

In this program, you will learn in-depth about C++ program to print star pyramid patterns of various types using nested loops.

To print star pyramid patterns in C++ programming, we have used two nested for loops.

The outer for loop is responsible for the number of rows in star (*) pyramid triangle or patterns whereas inner for loop will print the required number of stars * in each row.

Pattern printing programs in C++

Let’s take a look at various star pattern printing programs in C++.

Example: C++ program to print full star pyramid pattern

//C++ program to display full star pyramid

#include <iostream>
using namespace std;

int main()
{
   int rows, i, j, space;

   cout << "Enter number of rows: ";
   cin >> rows;

   for(i = 1; i <= rows; i++)
   {
      //for loop for displaying space
      for(space = i; space < rows; space++)
      {
         cout << " ";
      }
      //for loop to display star equal to row number
      for(j = 1; j <= (2 * i - 1); j++)
      {
         cout << "*";
      }

      cout << "\n";
   }

   return 0;
}

Output

Example: C++ program to print inverted full star pyramid pattern

//C++ program to display inverted full star pyramid

#include<iostream>
using namespace std;

int main()
{
   int rows, i, j, space;

   cout << "Enter number of rows: ";
   cin >> rows;

   for(i = rows; i >= 1; i--)
   {
      //for loop to put space
      for(space = i; space < rows; space++)
         cout << " ";
      //for loop for displaying star
      for(j = 1; j <= (2 * i - 1); j++)
         cout << "* ";

      cout << "\n";
   }

   return 0;
}

Output

Example: C++ program to print half star pyramid pattern

//C++ program to display half star pyramid

#include <iostream>
using namespace std;

int main()
{
   int n, i, j;

   cout << "Enter number of rows: ";
   cin >> n;

   for(i = 1; i <= n; i++)
   {
      //print * equal to row number
      for(j = 1; j <= i; j++)
      {
         cout << "* ";
      }
      cout << "\n";
   }
   return 0;
}

Output

Example: C++ program to print inverted half star pyramid pattern

//C++ program to display half inverted star pyramid

#include <iostream>
using namespace std;

int main()
{
   int i, j, row;

   cout << "Enter number of rows: ";
   cin >> row;

   for(i = row; i >= 1; i--)
   {
      //print * equal to row number
      for(j = 1; j <= i; j++)
      {
         cout << "* ";
      }
      cout << "\n";
   }

   return 0;
}

Output

Example: C++ program to print hollow star pyramid pattern

//C++ program to display hollow star pyramid

#include<iostream>
using namespace std;

int main()
{
   int rows, i, j, space;

   cout << "Enter number of rows: ";
   cin >> rows;

   for(i = 1; i <= rows; i++)
   {
      //for loop to put space in pyramid
      for (space = i; space < rows; space++)
         cout << " ";

      //for loop to print star
      for(j = 1; j <= (2 * rows - 1); j++)
      {
         if(i == rows || j == 1 || j == 2*i - 1)
            cout << "*";
         else
            cout << " ";
      }
      cout << "\n";
   }
   return 0;
}

Output

Example: C++ program to print inverted hollow star pyramid pattern

//C++ program to display inverted hollow star pyramid

#include<iostream>
using namespace std;

int main()
{
   int rows, i, j, space;

   cout << "Enter number of rows: ";
   cin >> rows;

   for(i = rows; i >= 1; i--)
   {
      //for loop to put space in pyramid
      for (space = i; space < rows; space++)
         cout << " ";

      //for loop to print star in pyramid
      for(j = 1; j <= 2 * i - 1; j++)
      {
         if(i == rows || j == 1 || j == 2*i - 1)
            cout << "*";
         else
            cout << " ";
      }
      cout << "\n";
   }
   return 0;
}

Output