[fpc-pascal] What about complex numbers?

[Carlos Avila]

Hello
Is complex number arithmetic possible in FPC? Another post recommends use
unit so named ucomplex, but i can't find any detailed information of this in
the documentation. But, amazingly, i sucessfully probed this small program:

PROGRAM DUMMY;

USES UCOMPLEX;

VAR

x,y, z, w: COMPLEX;

BEGIN
x := 8+i*7;
y := 4-5*i;
z := x+y;
w := x*y

END.

This program compile and run right, but why? I need to know about anything
subroutines that works with complex numbers. It is posibble to write math
operations like FORTRAN?

Thanks
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