Return largest integer not greater than its argument.

Related Syntax Constructs

The following construct(s) refer to this construct:

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Syntax

fn:floor(double? $number) => double?

Description

This function returns the largest integer that is not greater than the value of $number. If the argument is the empty sequence, it returns the empty sequence. If the argument is a literal, then the literal must be a valid lexical form of its type.

Argument

$number	double-precision number

Examples

• Call function with the numeric value 42.7:

  floor(42.7E0)

  floor(xs:float("42.7"))

  In both cases the double-precision number 4.2E1 is returned. In the first query the argument is a valid literal of the required type, in the second query the required type is achieved by constructing a value of type xs:float that is promoted to xs:double.

• Call function with the numeric value -273.15:

  floor(-273.15E0)

  This query returns -2.74E2.