XFA Specification
Chapter 23, FormCalc Specification
String Built-in Functions
879
Len()
This function returns the number of characters in a given string.
Syntax
Len(s1)
Parameters
s1
is the string to be evaluated.
Returns
The length or null if its parameter is null.
Examples
Len("ABC")
returns 3.
Len("ABCDEFG")
returns 7.