XML String-length()

• The string-length() function in XQuery is used to determine the length of the specified string.
• This function counts the number of characters (including spaces, special characters, and punctuation marks) in the specified string.

Syntax

The general syntax for the string-length() function in XQuery is as follows:

fn:string-length($string)

• $string represents the input string whose length needs to be determined.

Example

Suppose we have a string "Hello World" and we want to know its length. We can use the string-length() function as follows:

string-length("Hello World")

The output of the above expression will be 11.

Output

The string-length() function in XQuery returns the length of the specified string as an integer value.

Explanation

The string-length() function simply counts the number of characters in the specified string, including any spaces, special characters, and punctuation marks.

Use

The string-length() function can be useful in many situations, such as:

• Validating input length in web forms
• Finding the length of a specific attribute or element in XML documents
• Manipulating and transforming strings in XQuery

Important Points

• The string-length() function only accepts a single string argument.
• The function returns 0 if the input string is empty.
• Unicode characters are also counted as a single character in the string length.

Summary

In summary, the string-length() function in XQuery is used to determine the length of a given string. It returns an integer value that represents the number of characters in the specified string. The function is useful in various situations, such as validating input length and manipulating strings in XQuery. The function is straightforward and counts all characters (including spaces, special characters, and punctuation marks) in the input string.