Example: Hollow Diamond Pattern in C++

// Hollow Diamond Pattern
#include <iostream>
using namespace std;

int main() {
    int size = 3; // Define the size of the diamond

    // Step 1: Print the upper half of the hollow diamond
    for (int i = 1; i <= size; i++) {
        // Print leading spaces
        for (int j = 1; j <= size - i; j++) {
            cout << " ";
        }
        // Print stars for the border
        for (int k = 1; k <= 2 * i - 1; k++) {
            if (k == 1 || k == 2 * i - 1) { // First or last star in the row
                cout << "*";
            } else {
                cout << " "; // Print space in between
            }
        }
        cout << endl;
    }

    // Step 2: Print the lower half of the hollow diamond
    for (int i = size - 1; i >= 1; i--) {
        // Print leading spaces
        for (int j = 1; j <= size - i; j++) {
            cout << " ";
        }
        // Print stars for the border
        for (int k = 1; k <= 2 * i - 1; k++) {
            if (k == 1 || k == 2 * i - 1) { // First or last star in the row
                cout << "*";
            } else {
                cout << " "; // Print space in between
            }
        }
        cout << endl;
    }

    return 0;
}