Returns the natural logarithm of a complex number in x + yi or x + yj text format.
Syntax
IMLN(inumber)
Inumber is a complex number for which you want the natural logarithm.
Remarks
 Use COMPLEX to convert real and imaginary coefficients into a complex number.
 The natural logarithm of a complex number is:
Example
The example may be easier to understand if you copy it to a blank worksheet.
How to copy an example
 Create a blank workbook or worksheet.
 Select the example in the Help topic.
Note Do not select the row or column headers.
Selecting an example from Help
 Press CTRL+C.
 In the worksheet, select cell A1, and press CTRL+V.
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A 
B 
Formula 
Description (Result) 
=IMLN("3+4i") 
Natural logarithm of 3+4i (1.609438 + 0.927295i) 
