### 27.3.1 Defining a point in three-dimensions

See Section 26.5.2 for points in the plane.

With the 3D geometry screen in point mode, clicking on a point with the left mouse button will choose that point. Points chosen this way are automatically named, first with A, then B, etc.

Alternatively, the point command chooses a point.

- point takes one or three arguments: coords, where coords can be one of:
  - a,b,c, a sequence of three coordinates.
  - [a,b,c], a list of three coordinates.
- point(coords) returns and draws the point with the given coordinates.

Many commands which takes points as arguments can either take them as point(a,b,c) or the list of coordinates [a,b,c].

#### Example

point(1,2,5)

or:

point([1,2,5])

(The marker used to indicate the point can be changed; see Section 26.3.2.)