Hollow Square

Given an integer N, print a hollow square of size N x N where the perimeter consists of stars (*) and the interior consists of spaces.

Input Format

A single integer N.

Output Format

Print N rows forming a hollow square.

Constraints:1 <= N <= 20

Concepts Required:

Boundary checking (i == 1 || i == N || j == 1 || j == N)Conditional output within grid

Expected Pattern PreviewASCII Monospace

*****
*   *
*   *
*   *
*****

Notice how character spacing and row counts scale systematically based on the input N.

Example 1

Input:

Output:

*****
*   *
*   *
*   *
*****

Explanation: Top and bottom rows are solid stars. Middle rows have star on boundary and spaces inside.