LN(n)
- where n is the positive real number.
Description
- This function gives the natural logarithm of a number.
- LN is the logarithm in which the base is the irrational number e (= 2.71828 . . . ).
- For example, ln 10 = loge10 = approximately 2.30258.
- Also called Napierian logarithm.
- The constant e is called Euler's number.
- The natural logarithm is denoted by ln(x) or log e(x).
- where x is the Positive real number.
- The ln(x) is the inverse function of the exponential function e^ln(x)=x if x>0.
ln(e^x)=x
Examples
- =LN(15) = 2.708050201
- =LN(8.3) = 2.116255515
- =LN(1) = 0
- =LN(0) = INFINITY
- =LN(-20) = NAN
- =LN(exp(5)) = 5
- =EXP(LN(7)) = 7