XQuery String-length()

In XQuery, the fn:string-length() function is used to determine the length of a given string. It takes a single argument, which is the string whose length you want to calculate, and returns an integer representing the number of characters in the string.

The basic syntax of the fn:string-length() function is as follows:

fn:string-length($input-string)

• $input-string: The string for which you want to find the length.

Here’s an example of using fn:string-length() in XQuery:

let $text := "Hello, World!"
let $length := fn:string-length($text)
return $length

Output:

13

In this example, the variable $text contains the string “Hello, World!” The fn:string-length($text) function calculates the length of the string and assigns it to the variable $length. The output will be 13, as there are 13 characters in the string, including spaces and punctuation.

Keep in mind that fn:string-length() counts all characters in the string, including letters, digits, spaces, and any special characters. If the input string is empty, the function will return 0.