Ln()

2017-11-03 09:05:09

Category: Number

Syntax: `Ln ( number )`

Parameters:

numberAny positive number or expression that returns a positive number.

Data type returned: Number

Description:

Returns the natural logarithm of the specified number. The natural logarithm uses the transcendental number e as its base. The value of e is approximately 2.71828.

Exp() and Ln() are inverse functions of one another.

The Log() and Lg() functions produce base-10 and base-2 logarithms, respectively. The Ln() function produces base-e logarithms, but it can also be used to solve a logarithm of any base. Log (base-x) of y is equivalent to Ln (y) / Ln (x).

Examples:

Function	Results
`Ln (2.7182818)`	Returns `.9999999895305023`.
`Ln (Exp(1))`	Returns `1`.
`Ln (100)`	Returns `4.6051701859880914`.
`Ln (Exp(5))`	Returns `5`.

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