atan2() - math

This function calculates the arc tangent of the two variables x and y. It is similar to calculating the arc tangent of y / x, except that the signs of both arguments are used to determine the quadrant of the result.

The function returns the result in radians, which is between -PI and PI (inclusive).


Parameters : 
 y - Dividend parameter 
 x - Divisor parameter 

Syntax

float atan2
     ( float $y
    , float $x
    )

Example

Output / Return Value

Limitations

Alternatives / See Also

Reference