Log: Difference between revisions
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''This function is for BASIC compatibility. It is not available in pure JavaScript projects.'' | |||
Log(''number'') | Log(''number'') | ||
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Calculating base-n logarithm of x is achieved by dividing the natural logarithm of x by the natural logarithm of n. | Calculating base-n logarithm of x is achieved by dividing the natural logarithm of x by the natural logarithm of n. | ||
== Example == | == Example (Basic) == | ||
<pre> | <pre> | ||
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Print "Log(e) = " & Log(e) | Print "Log(e) = " & Log(e) | ||
Print "Log10(2) = " & LogN(10, 2) | Print "Log10(2) = " & LogN(10, 2) | ||
Function LogN(Base, Number) | Function LogN(Base, Number) | ||
LogN = LOG(Number) / LOG(Base) | LogN = LOG(Number) / LOG(Base) | ||
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== Related Items == | == Related Items == | ||
[[exp| | [[exp|Exp]] | ||
[[Category:Language Reference]] | [[Category:Language Reference]] | ||
[[Category:Math]] | |||
[[Category:BASIC Functions]] | |||
Latest revision as of 15:30, 25 March 2019
This function is for BASIC compatibility. It is not available in pure JavaScript projects.
Log(number)
Description
Log returns a double-precision value equal to the natural logarithm of a number. The required parameter, number, is any numeric expression. The natural logarithm is the base e logarithm; e is approximately equal to 2.718282.
Calculating base-n logarithm of x is achieved by dividing the natural logarithm of x by the natural logarithm of n.
Example (Basic)
Rem Log Example 'Log calculates natural logarithms Dim e e = 2.718282 Print "Log(1) = " & Log(1) Print "Log(e) = " & Log(e) Print "Log10(2) = " & LogN(10, 2) Function LogN(Base, Number) LogN = LOG(Number) / LOG(Base) End Function
Output
LOG(1) = 0 LOG(e) = 1 LOG10(2) = 0.30103