The Data Type COMPLEX

Abstract

Up to now when dealing with arithmetic expressions we have only considered the data types DOUBLE PRECISION, INTEGER, and REAL. In addition to this, full Fortran 77 is capable of dealing with arithmetic expressions containing complex values.^⋆) In general, complex numbers are represented by the following forms:

$$ z = x + iy $$

with

$$ i = \sqrt { - 1} $$

In Fortran, complex values are arranged in pairs of values:

$$z = (x,y)$$

where

• x represents the real part and

• y represents the imaginary part.