fn:count - XPath XQuery Reference

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XPath/XQuery count function

Returns the number of items in a sequence.

fn:count(

$arg as item()*

) as xs:integer

This function is deterministic, context-independent, and focus-independent.

The function returns the number of items in the value of $arg.

let $seq1 := ($item1, $item2)

let $seq2 := (98.5, 98.3, 98.9)

let $seq3 := ()

The expression fn:count($seq1) returns 2.

The expression fn:count($seq3) returns 0.

The expression fn:count($seq2) returns 3.

The expression fn:count($seq2[. > 100]) returns 0.

The expression fn:count([]) returns 1.

The expression fn:count([1,2,3]) returns 1.

Returns 0 if $arg is the empty sequence.

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