Manuals/calci/LN

LN(Number)

• where is the any positive real number.
• LN() returns the natural logarithm of a number.

Description

• This function gives the Natural Logarithm of a number.
• is the logarithm in which the base is the irrational number (= 2.71828...).
• For example,
• It was formely also called Hyperbolic logarithm.
• And also called Napierian logarithm.
• The constant is called Euler's number.
• The Natural Logarithm is denoted by or .
• where is the Positive real number.
• The is the inverse function of the exponential function if .

ZOS

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

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

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Natural Logarithm