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

 

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. 
 

👁 center of the circle using endpoints of diameter

 

Output : 
 

-2, -2

Time complexity: O(1)
Auxiliary Space: O(1)