realpart number → real

imagpart number → real

number — a number.

real — a real.

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.

(realpart #c(23 41)) → 23 
(imagpart #c(23 41.0)) → 41.0 
(realpart #c(23 41.0)) → 23.0 
(imagpart 23.0) → 0.0

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

complex