12.2.50 realpart, imagpart [Function]

realpart number => real

imagpart number => real

Arguments and Values::

number—a number.

real—a real.

Description::

realpart and imagpart return the real and imaginary parts of number respectively. If number is

real,

then realpart returns number and imagpart returns (* 0 number), which has the effect that the imaginary part of a rational is 0 and that of a float is a floating-point zero of the same format.

Examples::

      (realpart #c(23 41)) =>  23
      (imagpart #c(23 41.0)) =>  41.0
      (realpart #c(23 41.0)) =>  23.0
      (imagpart 23.0) =>  0.0

Exceptional Situations::

Should signal an error of type type-error if number is not a number.

See Also::

complex