JSTL fn:length() Function
The fn:length() function returns the number of characters inside a string, or the number of items in a collection. It is used for calculating the length of string and to find out the number of elements in a collection.
The syntax used for including the fn:length() function is:
It returns the length of object. The return type of this function is int .
Let's see the simple example to understand the functionality of fn:length() function: