Manuals/calci/LN

LN(number)

• where $number$ is the any 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 $e$ ($e$= 2.71828...).
• For example, $ln_{1}0=loge_{1}0\approx 2.30258$
• It was formely also called Hyperbolic logarithm.
• And also called Napierian logarithm.
• The constant $e$ is called Euler's number.
• The Natural Logarithm is denoted by $ln(x)$ or $loge(x)$.
• where $x$ is the Positive real number.
• The $ln(x)$ is the inverse function of the exponential function $e^{ln(x)}=x$ if $x>0$.
• $ln(e^{x})=x$

ZOS Section

• The syntax is to calculate Natural logarithm in ZOS is $LN(number)$.
  • where $number$ is the any positive real number.
• For e.g.,LN(20..23)

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

See Also

• LOG
• EXP

References

Natural Logarithm