exslt-math:constant

Delivers the value of one of the named constants PI, E, SQRRT2, LN2, LN10, LOG2E, SQRT1_2.

constant($name as xs:string, $precision as xs:integer) ➔ xs:double

Arguments
	$name	xs:string	The constant required
	$precision	xs:integer	The required precision
Result		xs:double

Namespace

http://exslt.org/math

Links to specifications

EXSLT Math Module

Notes on the Saxon implementation

The implementation starts with a decimal string representation of the constant, truncates this to the required precision, then parses the result as a double.