log

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Description

Description:

Base-10 logarithm of x.

The function of log(x) will never touch the y-axis.

Groups:

Math

Syntax

Syntax:

log x

Parameters:

x: Number - A positive number

Return Value:

Number

Examples

Example 1:

_log = log 10;

Example 2:

_log = log abs -10;

Example 3:

finite log -10; // Returns false

Additional Information

See also:

Math Commands Logarithm

Notes

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Only post proven facts here! Add Note

Posted on 23:14, 16 Jun 2014

ffur2007slx2_5

To clarify:

y = 10 ^ x // x = log y

People use logarithm at the purpose of simplifying multiplication via exponents plus years before.

23456*45634 = 1.07039e+009 log 23456 = 4.37025; log 45634 = 4.65929; (log 23456) + (log 45634) = 9.02954 10^((log 23456) + (log 45634)) = 10 ^ 9.02954 // same as 23456*45634

As modern usage, for instance, to evaluate another exponent when multiple is known (Which magnitude is 4 times stronger than 8.3 earthquake?):

//_Unknown = log x; 8.3 = log y // x = 10 ^_Unknown; y = 10 ^8.3 //x/y = (10 ^_Unknown)/(10 ^8.3) = log 4 // x/y = _Unknown – 8.3 = 0.6 //_result = 8.9 magnitude _result = (log 4) + 8.3