IMLN function

Returns the natural logarithm of a complex number in x + yi or x + yj text format.



Inumber     is a complex number for which you want the natural logarithm.


  • Use COMPLEX to convert real and imaginary coefficients into a complex number.

  • The natural logarithm of a complex number is:



The example may be easier to understand if you copy it to a blank worksheet.

How to copy an example

  1. Create a blank workbook or worksheet.

  2. Select the example in the Help topic.

    Note   Do not select the row or column headers.

    Selecting an example from Help

    Selecting an example from Help

  3. Press CTRL+C.

  4. In the worksheet, select cell A1, and press CTRL+V.

  5. To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.






Description (Result)


Natural logarithm of 3+4i (1.609438 + 0.927295i)

Applies To: Excel 2007

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