math:log

Returns the natural logarithm of $arg.

log($arg as xs:double?) ➔ xs:double?

Arguments
	$arg	xs:double?	The input number
Result		xs:double?

Namespace

http://www.w3.org/2005/xpath-functions/math

Links to W3C specifications

XPath 3.0 Functions and Operators

Notes on the Saxon implementation

Implemented since Saxon 9.4. Available whether or not XPath 3.0 is enabled. Saxon also (for compatibility) implements the function math:log() in namespace http://exslt.org/math.