The NumericClass(x) function returns the class of x represented as a type. The class of x is described by a Maple type that recognizes

- the computation environment, and

- the numerical type of x.

If x is complex, then NumericClass(x) returns as narrowly constrained a type as possible to recognize x. To obtain precise information about the real and imaginary part of x separately, use NumericClass(Re(x)) and NumericClass(Im(x)).

The NumericClass command is thread-safe as of Maple 15.

For more information on thread safety, see index/threadsafe.

NumericClass(0);

$\mathrm{rational}\wedge \mathrm{poszero}$

NumericClass(2.3);

$\mathrm{sfloat}\wedge \mathrm{positive}\wedge \mathrm{numeric}$

NumericClass(infinity);

$\mathrm{extended\_rational}\wedge \mathrm{positive}\wedge \mathrm{\infty }$

x := 3 - 2*I;

$x≔3-2\mathrm{I}$

NumericClass(x);

$\mathrm{nonreal}\left(\mathrm{posint}\vee \mathrm{negint}\right)$

NumericClass(Re(x));

$\mathrm{posint}$

NumericClass(Im(x));

$\mathrm{negint}$

NumericClass(2*I);

$\mathrm{imaginary}\left(\mathrm{posint}\right)$

NumericClass(HFloat(-4.5));

${\mathrm{float}}_8\wedge \mathrm{negative}\wedge \mathrm{numeric}$

NumericClass(HFloat(-3+5*I));

$\mathrm{nonreal}\left(\left({\mathrm{float}}_8\wedge \mathrm{negative}\wedge \mathrm{numeric}\right)\vee \left({\mathrm{float}}_8\wedge \mathrm{positive}\wedge \mathrm{numeric}\right)\right)$