The LN function returns the natural logarithm of a number (the power to which e must be raised to result in the number).
LN(pos-num)
pos-num: A number value. pos-num must be greater than 0.
Notes
EXP and LN are mathematical inverses over the domain where LN is defined, but because of floating-point rounding, =LN(EXP(x)) may not give exactly x.
Example |
|---|
=LN(2.71828) returns approximately 0.999999327347282, the power to which e must be raised to produce 2.71828. |