Node:Complex Numbers, Next:Exactness, Previous:Reals and Rationals, Up:Numbers
Complex numbers are the set of numbers that describe all possible points in a twodimensional space. The two coordinates of a particular point in this space are known as the real and imaginary parts of the complex number that describes that point.
In Guile, complex numbers are written in rectangular form as the sum of
their real and imaginary parts, using the symbol i
to indicate
the imaginary part.
3+4i => 3.0+4.0i (* 38i 2.3+0.3i) => 9.317.5i
Guile represents a complex number as a pair of numbers both of which are real, so the real and imaginary parts of a complex number have the same properties of inexactness and limited precision as single real numbers.
complex? x  Scheme Procedure 
scm_number_p (x)  C Function 
Return #t if x is a complex number, #f
otherwise. Note that the sets of real, rational and integer
values form subsets of the set of complex numbers, i. e. the
predicate will also be fulfilled if x is a real,
rational or integer number.
