# The point in the plane: point

### 13.6.2 The point in the plane: point

See Section 14.4.1 for points in space.

In the 2-d 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 two arguments:
  coords, where coords can be one of:
  - a,b, a sequence of two coordinates.
  - [a,b], a list of two coordinates.
  - a+bi, the affix of the point.
- point(coords) returns and draws the point with the given coordinates.

#### Example.

Input:

A:= point(2,1)

or:

A:= point([2,1])

or:

A:= point(2 + i)

Output:

The marker used to indicate the point can be changed; see Section 13.3.2.

If the point command has two numbers for arguments, at least one of which is complex but not real, then it will choose two points.

#### Example.

Input:

A:= point(1,2*i)

or:

A:= point([1,2*i])

Output:

There are two points named A; one with affix 1 and one with affix 2i.