This function returns the natural logarithm of the specified number.
LN(value)
For the argument, specify a positive numeric value.
This function is the inverse of EXP, so LN(EXP(x)) is x.
Accepts numeric data. Returns numeric data.
LN(B3)
LN(R1C2)
LN(10) gives the result 2.3025850930
LN(exp(1)) gives the result 1
This function is available in product version 1.0 or later.
EXP | LOG | LOGINV | Math and Trigonometry Functions