What is COMPLEX function in Excel?
The COMPLEX function is one of the Engineering functions of Excel.
It Converts real and imaginary coefficients into complex numbers.
We can find this function in Engineering of insert function Tab.
How to use COMPLEX function in excel
- Click on an empty cell (like F5 )

2. Click on the fx icon (or press shift+F3).

3. In the insert function tab you will see all functions.

4. Select Engineering category.
5. Select COMPLEX function.
6. Then select ok.

7. In the function arguments Tab you will see COMPLEX function.
8. Real_num section is the real coefficient of the complex number.
9. l_num section is the imaginary coefficient of the complex number.
10. Suffix section is the suffix for the imaginary component of the complex number.
11. You will see the results in the formula result section.

Examples of COMPLEX function in Excel
Example 1:
How to use COMPLEX function in excel
You can see examples of COMPLEX function below:

complex(A2,B2) ----->>>>answer is 1+3i
complex(A3,B3) ----->>>>answer is 1+3i
complex(A4,B4) ----->>>>answer is 2+4i
complex(A5,B5) ----->>>>answer is 2+4i
Purpose of COMPLEX function
It Converts real and imaginary coefficients into complex numbers.
Return value of COMPLEX function
It returns a number.
Arguments of COMPLEX function
This function has just 2 Argument.
The argument of COMPLEX function is number.
Real_num section is the real coefficient of the complex number.
l_num section is the imaginary coefficient of the complex number.
The argument of COMPLEX function is required and not optional.
COMPLEX(number) = number
Version of excel supports COMPLEX function
This function is available for all excel versions (2003-2019)
Errors in COMPLEX function
COMPLEX related functions
- Use IMREAL function to return the real coefficient of a complex number.
- Use IMAGINARY Function to return the imaginary coefficient of a complex number.
- Use IMDIV function to return the quotient of two complex numbers.