Contributor: ROBERT ROTHENBURG { ROBERT ROTHENBURG > Can you compute complex numbers and/or "i" in Pascal...if so, how. Not too hard. I've done that With some fractal Programs, which were written For TP5 (it might be easier using OOP With the later versions). I use two Variables For a complex number of a+bi, usually expressed as xa and xb (or x.a and x.b as a Record). For addition/subtraction (complex z=x+y): z.a:=x.a+y.a; z.b:=x.b+y.b; For multiplication: z.a:=(x.a*y.a)-(x.b*y.b); z.b:=(x.a*y.b)+(x.b*y.a); }