COMPLEX*8 Format A COMPLEX or COMPLEX*8 datum is a processor approximation to the value of a complex number. A COMPLEX*8 datum occupies two consecutive 32-bit words in memory. The real and the imaginary parts are each stored in one word, in the format of a REAL*4 datum. The value of each part is determined as for a REAL*4 datum.Figure 10-7. COMPLEX*8 Format