number
Converts a value or a node to a number
Description
The fn:number function constructs an xs:double value either from a node that contains a number, or from an atomic value. This function is useful for telling the processor to treat a node or value as a number, regardless of its declared type (if any). It returns the argument cast as an xs:double.
The difference between using the fn:number function and the xs:double constructor is that the fn:number function returns the value NaN in the case that the argument cannot be cast to a numeric value, whereas the xs:double constructor will raise an error.
Parameters |
Description |
|---|---|
arg:integer() |
Examples
XPath |
Results |
|---|---|
number($priceDoc//prod[1]/price) |
29.99 |
number($priceDoc//prod/price) |
Error XPTY0004 |
number($priceDoc//prod[1]/@currency) |
NaN |
number(‘29,99’) |
29.99 |
number(‘ABC’) |
NaN |
number( () ) |
NaN |
$priceDoc//prod/price[number() > 35] |
<price currency=”USD”>69.99</price> <price currency=”USD”>39.99</price> |