IMPRODUCT Function

Basic Description

The Excel IMPRODUCT function calculates the product of two or more complex numbers.

Syntax: IMPRODUCT( inumber1, inumber2, … )

where the inumber1, inumber2, … arguments are between 2 and 29 supplied Complex Numbers.

Note that complex numbers are simply stored as text in Excel. When a text string in the format “a+bi” or “a+bj” is supplied to one of Excel’s built-in complex number functions, this is interpreted as a complex number. Also the complex number functions can accept a simple numeric value, as this is equivalent to a complex number whose imaginary coefficient is equal to 0. Therefore, the inumber arguments can be supplied to the Excel Improduct function as either:

A simple number
or
A complex number encased in quotation marks – eg. “5+3i”
or
A reference to a cell containing a complex number or a numeric value
or
A value returned from another Excel function or formula

These are all included in the examples below.

 

Improduct Function Examples

In the example below, the Excel Improduct function is used find the product of different complex numbers. The functions are shown in the spreadsheet on the left and the results are shown in the spreadsheet on the right.

 Formulas:
A B
1 1-i =IMPRODUCT( A1, A2 )
2 5+10i =IMPRODUCT( “1-i”, “5+10i”, 2 )
3 =IMPRODUCT( COMPLEX( 5, 2 ), COMPLEX( 0, 1 ) )
 Results:
A B
1 1-i 15+5i
2 5+10i 30+10i
3 -2+5i

 

 

Improduct Function Errors

If you get an error from your Excel Improduct function this is likely to be one of the following :

#NUM! Occurs if the supplied inumber argument is not recognised as a complex number
#NAME? Occurs when Analysis ToolPak add-in is not enabled in your Excel.

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