Name: ln

Type: function

Syntax: the ln of <number> 

Syntax: ln(<number>)

Summary: <return|Returns> the natural logarithm of a number.

Introduced: 1.0

OS: mac,windows,linux,ios,android

Platforms: desktop,server,web,mobile

Example:
ln(1) -- returns zero

Example:
ln(0.15) -- returns -1.89712

Example:
ln(10) -- returns 2.302585

Parameters:
number: A positive number, or an expression that evaluates to a positive number.

Returns: The <ln> <function> <return|returns> a number.

Description:
Use the <ln> function to obtain a base e logarithm.

The natural logarithm of a <number> is the power to which e must be raised to obtain the <number>.

The transcendental number e appears in many mathematical formulas.

To find the logarithm of a number in any base, use the following function:

  function logarithm theBase,theNumber
    return ln(theNumber)/ln(theBase)
  end logarithm

References: function (control_st), ln1 (function), exp (function), return (glossary)

Tags: math
