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Excel

IMLN function in Excel

Returns the natural logarithm of a complex number

=IMLN(inumber)

IMLN syntax and parameters

One argument, one required.

  • inumberstringRequired

    A complex number for which you want the natural logarithm.

IMLN examples

Formulas you'll actually reuse.

  1. Natural log of a complex number — ln|z| plus i·arg(z):

    =IMLN("3+4i")

    Result"1.6094+0.9273i"

  2. Just the real part — the log of the magnitude, 5:

    =IMREAL(IMLN("3+4i"))

    Result1.6094

IMLN in Google Sheets

Same name — your formula ports as-is.

Try IMLN in the playground

Edit the example — nothing to install.

Preloaded with the IMLN formula from Example 1 — change anything and watch it respond.

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Related functions

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