# 3.5.1.2.7 Angle

## Description

The angle(x, y) function returns the angle in radians measured between the positive X axis and the line joining the origin (0,0) with the point given by (x, y). The returned values range from 0 to $2pi$. Note that angle(0, 0) returns a missing value because the result is undefined.

## Syntax

double angle(double x, double y)

x

the X-coordinate

y

the Y-coordinate

## Return

Returns the angle in radians measured between the positive X axis and the line joining the origin (0,0) with the point given by (x, y).

## Example

angle(1,1)=; //angle(1,1)=0.78539816339745