# Solid square inside a hollow square | Pattern

Given the value of n, print a hollow square of side length n and inside it a solid square of side length (n – 4) using stars(*).
Examples :

```Input : n = 6
Output :
******
*    *
* ** *
* ** *
*    *
******

Input : n = 11
Output :
***********
*         *
* ******* *
* ******* *
* ******* *
* ******* *
* ******* *
* ******* *
* ******* *
*         *
***********```

## C++

 `// C++ implementation to print ` `// solid square inside a hollow square ` `#include ` `using` `namespace` `std; ` ` `  `// function to print the required pattern ` `void` `print_Pattern(``int` `n)  ` `{ ` `    ``for` `(``int` `i = 1; i <= n; i++) { ` `    ``for` `(``int` `j = 1; j <= n; j++) { ` `         `  `    ``// First two conditions are for outer ` `    ``// hollow square and next two conditions ` `    ``// are for inner solid square ` `    ``if` `((i == 1 || i == n) || (j == 1 || j == n) || ` `        ``(i >= 3 && i <= n - 2) && (j >= 3 && j <= n - 2)) ` `        ``cout<< ``"*"``; ` ` `  `    ``else` `        ``cout<< ``" "``; ` `    ``} ` ` `  `    ``cout<

## Java

 `// Java implementation to print ` `// solid square inside a hollow square ` `import` `java.io.*; ` ` `  `class` `GFG  ` `{ ` `    ``// function to print the required pattern ` `    ``static` `void` `print_Pattern(``int` `n)  ` `    ``{ ` `        ``for` `(``int` `i = ``1``; i <= n; i++)  ` `        ``{ ` `            ``for` `(``int` `j = ``1``; j <= n; j++)  ` `            ``{ ` `                 `  `            ``// First two conditions are for outer ` `            ``// hollow square and next two conditions ` `            ``// are for inner solid square ` `            ``if` `((i == ``1` `|| i == n) || (j == ``1` `|| j == n) || ` `                ``(i >= ``3` `&& i <= n - ``2``) && (j >= ``3` `&& j <= n - ``2``)) ` `                ``System.out.print(``"*"``); ` `         `  `            ``else` `                ``System.out.print(``" "``); ` `            ``} ` `     `  `        ``System.out.println(); ` `        ``} ` `    ``} ` `     `  `    ``// Driver Code ` `    ``public` `static` `void` `main (String[] args)  ` `    ``{ ` `        ``// Take n as input ` `        ``int` `n = ``6``; ` `         `  `        ``// function calling ` `        ``print_Pattern(n); ` `         `  `    ``} ` `} ` ` `  `// This code is contributed by vt_m. `

## Python3

 `# Python3 implementation to print ` `# solid square inside a hollow square ` ` `  `# Function to print the required pattern ` `def` `print_Pattern(n):  ` ` `  `    ``for` `i ``in` `range``(``1``, n ``+` `1``): ` `        ``for` `j ``in` `range``(``1``, n ``+` `1``):  ` `         `  `        ``# First two conditions are for outer ` `        ``# hollow square and next two conditions ` `        ``# are for inner solid square ` `            ``if` `((i ``=``=` `1` `or` `i ``=``=` `n) ``or` `                ``(j ``=``=` `1` `or` `j ``=``=` `n) ``or` `                ``(i >``=` `3` `and` `i <``=` `n ``-` `2``) ``and` `                ``(j >``=` `3` `and` `j <``=` `n ``-` `2``)): ` `                ``print``(``"*"``, end ``=` `"") ` ` `  `            ``else``: ` `                ``print``(end ``=` `" "``) ` ` `  `        ``print``() ` ` `  `# Driver Code ` `n ``=` `6` `print_Pattern(n) ` `     `  `# This code is contributed by Azkia Anam. `

## C#

 `// C# implementation to print solid square ` `// inside a hollow square ` `using` `System; ` ` `  `class` `GFG { ` `     `  `    ``// function to print the required ` `    ``// pattern ` `    ``static` `void` `print_Pattern(``int` `n)  ` `    ``{ ` `        ``for` `(``int` `i = 1; i <= n; i++)  ` `        ``{ ` `            ``for` `(``int` `j = 1; j <= n; j++)  ` `            ``{ ` `                 `  `            ``// First two conditions are  ` `            ``// for outer hollow square  ` `            ``// and next two conditions ` `            ``// are for inner solid square ` `            ``if` `((i == 1 || i == n) ||  ` `                ``(j == 1 || j == n) || ` `               ``(i >= 3 && i <= n - 2) &&  ` `                 ``(j >= 3 && j <= n - 2)) ` `                ``Console.Write(``"*"``); ` `         `  `            ``else` `                ``Console.Write(``" "``); ` `            ``} ` `     `  `            ``Console.WriteLine(); ` `        ``} ` `    ``} ` `     `  `    ``// Driver Code ` `    ``public` `static` `void` `Main ()  ` `    ``{ ` `         `  `        ``// Take n as input ` `        ``int` `n = 6; ` `         `  `        ``// function calling ` `        ``print_Pattern(n); ` `    ``} ` `} ` ` `  `// This code is contributed by vt_m. `

## PHP

 `= 3 && ``\$i` `<= ``\$n` `- 2) &&  ` `                ``(``\$j` `>= 3 && ``\$j` `<= ``\$n` `- 2)) ` `                ``echo` `"*"``; ` `         `  `            ``else` `                ``echo` `" "``; ` `        ``} ` `        ``echo` `"\n"``; ` `    ``} ` `} ` ` `  `// Driver Code ` `\$n` `= 6;  ` `print_Pattern(``\$n``); ` ` `  `// This code is contributed by Mithun Kumar ` `?> `

## Javascript

 ``

Output :

```******
*    *
* ** *
* ** *
*    *
******```

Time complexity: O(n2) for given input n
Auxiliary Space: O(1)

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