`ntype'
-------

ntype(NUM)
     :: Classifier of type NUM.  Returns a sub-type number, an integer,
     for OBJ.

RETURN
     integer

OBJ
     number

   * Sub-types for type number are listed below.
    0
          rational number

    1
          floating double (double precision floating point number)

    2
          algebraic number over rational number field

    3
          arbitrary precision floating point number (bigfloat)

    4
          complex number

    5
          element of a finite field

    6
          element of a large finite prime field

    7
          element of a finite field of characteristic 2

   * When arithmetic operations for numbers are performed, type
     coercion will be taken if their number sub-types are different so
     that the object having smaller sub-type number will be transformed
     to match the other object, except for algebraic numbers.

   * A number object created by `newalg(x^2+1)' and the unit of
     imaginary number `@i' have different number sub-types, and it is
     treated independently.

   * See *Note Algebraic numbers:: for algebraic numbers.

     [0] [10/37,ntype(10/37)];
     [10/37,0]
     [1] [10.0/37.0,ntype(10.0/37.0)];
     [0.27027,1]
     [2] [newalg(x^2+1)+1,ntype(newalg(x^2+1)+1)];
     [(#0+1),2]
     [3] [eval(sin(@pi/6)),ntype(eval(sin(@pi/6)))];
     [0.49999999999999999991,3]
     [4] [@i+1,ntype(@i+1)];
     [(1+1*@i),4]

References
     *Note `type': type.

