# Excel COMPLEX Function

The Excel COMPLEX function creates a complex number with given real and imaginary coefficients. COMPLEX returns a text result in the form x + yi or x + yj.

**real_num**- The real number.**i_num**- The imaginary number.**suffix**- [optional] The suffix, either "i" or "j".

A complex number has two parts: a real number and an imaginary number. The COMPLEX function converts real and imaginary coefficients into a complex number of the form x + yi or x + yj, where x represents the real number and y represents the imaginary number. For example:

=COMPLEX(5,3) // returns 5+3i

To use the "j" instead of "i":

=COMPLEX(5,3,"j") // returns 5+3j

In the example shown, the formula in E6 is:

=COMPLEX(B6,C6)

Notes:

- If omitted,
**suffix**is defaults to "i". **suffix**must be lowercase "i" or "j"; other values result in a #VALUE error.- If
**real_num**or**i_num**are nonnumeric, COMPLEX returns the #VALUE! error.

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