Middle
Purpose 
Extracts the numberOfCharacters from text, starting at the character position specified by start.
Format 
Middle(text;start;numberOfCharacters)
Parameters 
text - any text expression or text field
start - any numeric expression or field containing a number
numberOfCharacters - any numeric expression or field containing a number
Data type returned 
text
Originated in 
FileMaker Pro 6.0 or earlier
Examples 
Middle(“(408)555-9054”;2;3) returns 408.
Middle(PhoneNumber;2;3) returns 408 when the PhoneNumber field contains (408) 555-9054.
Middle(“abcdefghij”;5;2) returns ef.
Middle(Name;Position(Name;“ ”;1;1)+1;3) returns Smi, when the text field Name contains John Smith.
Related topics 
Functions reference (category list)
Functions reference (alphabetical list)
About formulas
About functions
Defining calculation fields
Using operators in formulas