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| ANSI Common Lisp 12 Numbers 12.2 Dictionary of Numbers
12.2.50 realpart, imagpart | Function
  Syntax: 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 Allegro CL Implementation Details: None.

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