# Program to find the area of a Square

What is a square ? **Square is **a flat shape, in one plane, defined by four points at the four corners. A square has four sides all of equal length, and four corners, all right angles (90 degree angles). A square is a kind of rectangle but with all sides equal.

**Formula :**

Examples:

Input : 4 Output :16 Input :8 Output :64

## CPP

`// CPP program to find the area of a square` `#include <iostream>` `using` `namespace` `std;` `// function to find the area` `int` `area_fun(` `int` `side)` `{` `int` `area = side * side;` `return` `area;` `}` `// Driver program` `int` `main()` `{` `int` `side = 4;` `int` `area = area_fun(side);` `cout << area;` `return` `0;` `}` |

## Java

`// Java program to find` `// the area of a square` `class` `GFG` `{` `// function to find the area` `static` `int` `area_fun(` `int` `side)` `{` `int` `area = side * side;` `return` `area;` `}` `// Driver code` `public` `static` `void` `main(String arg[])` `{` ` ` `int` `side = ` `4` `;` ` ` `int` `area = area_fun(side);` ` ` `System.out.println(area);` `}` `}` `// This code is contributed` `// by Anant Agarwal.` |

## Python3

`# Python program to find` `# the area of a square` `# function to find the area` `def` `area_fun(side):` ` ` `area ` `=` `side ` `*` `side` ` ` `return` `area` `# Driver program` `side ` `=` `4` `area ` `=` `area_fun(side)` `print` `(area)` `# This Code is Contributed` `# by Azkia Anam.` |

## C#

`// C# program to find` `// the area of a square` `using` `System;` `class` `GFG {` ` ` `// function to find the area` ` ` `static` `int` `area_fun(` `int` `side)` ` ` `{` ` ` `int` `area = side * side;` ` ` `return` `area;` ` ` `}` ` ` `// Driver code` ` ` `public` `static` `void` `Main()` ` ` `{` ` ` `int` `side = 4;` ` ` `int` `area = area_fun(side);` ` ` `Console.WriteLine(area);` ` ` `}` `}` `// This code is contributed by vt_m.` |

## PHP

`<?php` `// PHP program to find the` `// area of a square` `// function to find the area` `function` `area_fun(` `$side` `)` `{` ` ` `$area` `= ` `$side` `* ` `$side` `;` ` ` `return` `$area` `;` `}` `// Driver program` `$side` `= 4;` `$area` `= area_fun(` `$side` `);` `echo` `( ` `$area` `);` `// This code is contributed` `// by vt_m.` `?>` |

## Javascript

`<script>` `// Javascript program to find the area of a square` `// function to find the area` `function` `area_fun(side)` `{` ` ` `let area = side * side;` ` ` `return` `area;` `}` `// Driver program` `let side = 4;` `let area = area_fun(side);` `document.write(area);` `// This code is contributed by Mayank Tyagi` `</script>` |

Output:

16

This article is contributed by **Ajay Puri**. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above..

Attention reader! Don’t stop learning now. Get hold of all the important mathematical concepts for competitive programming with the **Essential Maths for CP Course** at a student-friendly price. To complete your preparation from learning a language to DS Algo and many more, please refer **Complete Interview Preparation Course****.**