abs function
The fn:abs function returns the absolute value of a numeric value.
Syntax
- numeric-value
- An atomic value or an empty sequence. If numeric-value is an atomic value, it has one of the following types:
- xs:float
- xs:double
- xs:decimal
- xs:integer
- A type that is derived from any of the previously listed types
- xdt:untypedAtomic
Returned value
If numeric-value is not the empty sequence, the returned value is the absolute value of numeric-value.
If numeric-value is the empty sequence, fn:abs returns the empty sequence.
The data
type of the returned value depends on the data type of numeric-value:
- If numeric-value is xs:float, xs:double, xs:decimal, or xs:integer, the value that is returned has the same type as numeric-value.
- If numeric-value has a data type that is derived from xs:float, xs:double, xs:decimal, or xs:integer, the value that is returned has the direct parent data type of numeric-value.
- If numeric-value has the xdt:untypedAtomic data type, the value that is returned has the xs:double data type.
Example
The following function returns the
absolute value of -10.5.
fn:abs(-10.5)The returned value is 10.5.