# Find the center of the circle using endpoints of diameter

Given two endpoint of diameter of a circle (x1, y1) and (x2, y2) find out the center of a circle.

Examples :

```Input  : x1 = -9, y1 = 3, and
x2 = 5, y2 = –7
Output : -2, –2

Input  :  x1 = 5, y1 = 3 and
x2 = –10 y2 = 4
Output : –2.5, 3.5
```

## Recommended: Please try your approach on {IDE} first, before moving on to the solution.

Midpoint Formula:
The midpoint of two points, (x1, y2) and (x2, y2) is : M = ((x 1 + x 2) / 2, (y 1 + y 2) / 2)

The center of the circle is the mid point of its diameter so we calculate the mid point of its diameter by using midpoint formula. ## C++

 `// C++ program to find the ` `// center of the circle ` `#include ` `using` `namespace` `std; ` ` `  `// function to find the ` `// center of the circle ` `void` `center(``int` `x1, ``int` `x2, ` `            ``int` `y1, ``int` `y2) ` `{ ` `     `  `    ``cout << (``float``)(x1 + x2) / 2 <<  ` `          ``", "` `<< (``float``)(y1 + y2) / 2; ` `} ` ` `  `// Driven Program ` `int` `main() ` `{ ` `    ``int` `x1 = -9, y1 = 3, x2 = 5, y2 = -7; ` `    ``center(x1, x2, y1, y2); ` `    ``return` `0; ` `} `

## Java

 `// Java program to find the ` `// center of the circle ` `class` `GFG { ` `     `  `    ``// function to find the ` `    ``// center of the circle ` `    ``static` `void` `center(``int` `x1, ``int` `x2,  ` `                            ``int` `y1, ``int` `y2)  ` `    ``{ ` `         `  `        ``System.out.print((``float``)(x1 + x2) / ``2`  `            ``+ ``", "` `+ (``float``)(y1 + y2) / ``2``); ` `    ``} ` `     `  `    ``// Driver Program to test above function ` `    ``public` `static` `void` `main(String arg[]) { ` `         `  `        ``int` `x1 = -``9``, y1 = ``3``, x2 = ``5``, y2 = -``7``; ` `        ``center(x1, x2, y1, y2); ` `    ``} ` `} ` ` `  `// This code is contributed by Anant Agarwal. `

## Python3

 `# Python3 program to find  ` `# the center of the circle ` ` `  `# Function to find the ` `# center of the circle ` `def` `center(x1, x2, y1, y2) : ` ` `  `    ``print``(``int``((x1 ``+` `x2) ``/` `2``), end``=` `"") ` `    ``print``(``","``, ``int``((y1 ``+` `y2) ``/` `2``) ) ` ` `  `# Driver Code ` `x1 ``=` `-``9``; y1 ``=` `3``; x2 ``=` `5``; y2 ``=` `-``7` `center(x1, x2, y1, y2)  ` ` `  `# This code is contributed by Smitha Dinesh Semwal `

## C#

 `// C# program to find the ` `// center of the circle ` `using` `System; ` ` `  `class` `GFG { ` `     `  `    ``// function to find the ` `    ``// center of the circle ` `    ``static` `void` `center(``int` `x1, ``int` `x2,  ` `                            ``int` `y1, ``int` `y2)  ` `    ``{ ` `         `  `        ``Console.WriteLine((``float``)(x1 + x2) / 2 ` `                ``+ ``", "` `+ (``float``)(y1 + y2) / 2); ` `    ``} ` `     `  `    ``// Driver Program to test above function ` `    ``public` `static` `void` `Main() { ` `         `  `        ``int` `x1 = -9, y1 = 3, x2 = 5, y2 = -7; ` `        ``center(x1, x2, y1, y2); ` `    ``} ` `} ` ` `  `// This code is contributed by vt_m. `

## PHP

 ` `

Output :

```-2, -2
```

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