IMLN(inumber)
=IMLN(2)
The IMLN function returns the natural log of a number. To use the function, you can enter a number, complex number, or cell reference as the argument, returns the natural log of 2
=IMLN(COMPLEX(1, -1))
You can also use the COMPLEX function in the argument of IMLN, and returns the natural log of the complex number 1-i.
The IMLN function calculates the natural logarithm of a complex number, taking a complex number as an argument.