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Template:Log 2/doc
From OeisWiki
The {{log_2}} mathematical function template returns the binary logarithm of , where is a positive real number.
Contents
Usage
- {{log_2|a positive real number}}
Valid input
- A positive real number as argument.
Examples
Examples with valid input
Code Result {{log_2|0.5}} -1 {{log_2|1}} 0 {{log_2|1.5}} 0.58496250072116 {{log_2|2}} 1 {{log_2|6}} 2.5849625007212 {{log_2|8}} 3 {{log_2|2^40}} 40
Examples with invalid input (returns an error message)
Code Result {{log_2|i}} Log_2 error: Argument must be a positive real number {{log_2|-1}} Log_2 error: Argument must be a positive real number {{log_2|0}} Log_2 error: Argument must be a positive real number
Code
<noinclude>{{documentation}}</noinclude><includeonly>{{ifnum| {{{1|NaN}}} | {{#ifexpr: ( {{{1}}} ) > 0 | {{#expr: ln ( {{{1}}} ) / ln 2 }} | {{error| Log_2 error: Argument must be a positive real number }} }} | {{error| Log_2 error: Argument must be a positive real number }} }}</includeonly>