atan2 Arc tangent of two variables &reftitle.description; floatatan2 floaty floatx 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). &reftitle.parameters; y Dividend parameter x Divisor parameter &reftitle.returnvalues; The arc tangent of y/x in radians. &reftitle.seealso; atan