C++ Program to Print Hollow Right Angled Triangle Star Pattern

Write a C++ program to print the hollow right angled triangle star pattern using for loop. 

#include<iostream>
using namespace std;

int main()
{
	int i, j, rows;
     
    cout << "Enter Hollow Right Triangle Star Pattern Row = ";
    cin >> rows;

    cout << "Hollow Right Angled Triangle Star Pattern\n"; 

    for(i = 1; i <= rows; i++)
    {
    	for(j = 1; j <= i; j++)
		{
            if(i == 1 || i == rows || j == 1 || j == i)
            {
                cout << "* ";
            }
            else
            {
                cout << "  ";
            }
        }
        cout << "\n";
    }		
 	return 0;
}
C++ Program to Print Hollow Right Angled Triangle Star Pattern

This example prints the hollow right angled triangle pattern of a given character using a while loop.

#include<iostream>
using namespace std;

int main()
{
	int i = 1, j, rows;
    char ch;
     
    cout << "Enter Hollow Right Triangle Star Pattern Row = ";
    cin >> rows;

    cout << "Enter Symbol for Hollow Right Triangle Pattern = ";
    cin >> ch;

    cout << "Hollow Right Angled Triangle Star Pattern\n"; 

    while(i <= rows)
    {
        j = 1; 
    	while(j <= i)
		{
            if(i == 1 || i == rows || j == 1 || j == i)
            {
                cout << ch << " ";
            }
            else
            {
                cout << "  ";
            }
            j++;
        }
        cout << "\n";
        i++;
    }		
 	return 0;
}
Enter Hollow Right Triangle Star Pattern Row = 16
Enter Symbol for Hollow Right Triangle Pattern = $
Hollow Right Angled Triangle Star Pattern
$ 
$ $ 
$   $ 
$     $ 
$       $ 
$         $ 
$           $ 
$             $ 
$               $ 
$                 $ 
$                   $ 
$                     $ 
$                       $ 
$                         $ 
$                           $ 
$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $

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Suresh is the founder of TutorialGateway and a freelance software developer. He specialized in Designing and Developing Windows and Web applications. The experience he gained in Programming and BI integration, and reporting tools translates into this blog. You can find him on Facebook or Twitter.