# Manuals/calci/IMLOG10

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**IMLOG10(Complexnumber,Base)**

- is of the form
- is value of the base.

## Description

- This function gives the common logarithm of a complex number.
- In , where Complexnumber is in the form of . i.e & are the real numbers.
- And is the imaginary unit ..
- Log base 10, is known as the common Logarithm or Decadic logarithm, is the logarithm to the base 10.
- To find the common logarithm of a complex number, we have to calculate from the Natural Logarithm.
- So .
- We can use COMPLEX function to convert real and imaginary number into a complex number.

## Examples

- =IMLOG10("6+7i") = 0.964709462857146+0.37443569720420i
- =IMLOG10("4-5i") = 0.806391928359868-0.389151908999031i
- =IMLOG10("8") = 0.903089986991944
- =IMLOG10("3i") = 0.477121254719662+0.682188176920921i
- =IMLOG10("0") = NULL