Template:Log 10/doc

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The {{log_10}} mathematical function template returns the common logarithm of $\scriptstyle x\,$, where $\scriptstyle x\,$ is a positive real number.

Usage

{{log_10|a positive real number}}

Valid input

A positive real number as argument.

Examples

Examples with valid input

Code	Result
{{log_10|0.1}}	-1
{{log_10|1}}	0
{{log_10|1.5}}	0.17609125905568
{{log_10|10}}	1
{{log_10|150}}	2.1760912590557
{{log_10|1000}}	3
{{log_10|10^40}}	40
{{log_10|10^25 * 10^40}}	65

Examples with invalid input (returns an error message)

Code	Result
{{log_10|i}}
{{log_10|-1}}
{{log_10|0}}

Code

{{ifnum| {{{1|not a number}}}
| {{#ifexpr: ({{{1}}}) > 0
  | {{#expr: ln ({{{1}}}) / ln 10 }}
  | {{error| Log_10 error: Argument must be a positive real number }}
  }}
| {{error| Log_10 error: Argument must be a positive real number }}
}}

See also

• {{log}} or {{log_e}} or {{ln}}
• {{log_2}}
• {{log_10}}
• {{log_b}}