Diamond C++ Practical class 11

#include <iostream>
using namespace std;

int main() {
int n = 5;
for (int i = 0; i < n; i++) {
for (int j = 0; j < n - i - 1; j++)
cout << " ";
for (int k = 0; k < 2 * i + 1; k++)
cout << "";
cout << endl;
}
for (int i = n - 2; i >= 0; i--) {
for (int j = 0; j < n - i - 1; j++)
cout << " ";
for (int k = 0; k < 2 * i + 1; k++)
cout << "";
cout << endl;
}

return 0;

}