atan2() function returns the angle in the plane between the positive x-axis and the ray from (0, 0) to the point (x, y), for atan2(y, x).
This function is defined in <math.h> header file.
|y||Required||Specifies the y coordinate of the point.|
|x||Required||Specifies the x coordinate of the point.|
|Number||The arc-tangent of the quotient of its arguments.
The return value will be between -π and π.
The return value is represented in radians.