COMPLEX
Category: Engineering Function.
Description: Converts real and imaginary coefficients into a complex number of the form x + yi or x + yj.
Syntax: COMPLEX(real_num,i_num,suffix)
Real_num is the real coefficient of the complex number. 
I_num is the imaginary coefficient of the complex number. 
Suffix is the suffix for the imaginary component of the complex number. 
If omitted, suffix is assumed to be 'i'.
