Type Command

Type( <Object> )

For conics and quadrics this command returns a number representing the conic/quadric type according to the table below. In this context empty conic (or quadric) is one where all coefficients are defined, but the conic (quadric) contains no points, e.g. x²+y²=-1. For conics GeoGebra distinguishes double line (special case of parallel lines with distance 0) and single line (special case of circle with infinite diameter, may result from circle inversion). For quadrics there is no such distinction.

Example: Type(x²+y²=1) yields 4 which stands for circle.

Value	Type of conic	Type of quadric
1	Single point	Single point
2	Intersecting lines
3	Ellipse	Ellipsoid
4	Circle	Sphere
5	Hyperbola
6	Empty	Empty
7	Double line
8	Parallel lines
9	Parabola	Paraboloid
10	Line	Line
30		Cone
31		Cylinder
33		Plane
34		Parallel planes
35		Intersecting planes
36		Hyperboloid of one sheet
37		Hyperboloid of two sheets
38		Parabolic cylinder
39		Hyperbolic cylinder
40		Hyperbolic paraboloid