pattern_27.cpp

#include <iostream>
using namespace std;
int main()
{
    int n;
    cout << "Enter the number of rows : ";
    cin >> n;
    for (int i = 0; i <= n; i++)
    {
        for (int j = 0; j < n - i; j++)
        {
            cout << " ";
        }
        for (int star = 0; star < 2 * i + 1; star++)
        {
            cout << "*";
        }
        cout << endl;
    }
    return 0;
}

/*
                                                Output n = 5
                                                    *
                                                  * * *
                                                * * * * *
                                              * * * * * * *
                                             * * * * * * * *

*/