Navigation: Language Reference > App E - Legacy Statements >====== FUNCTION (define a function)  ====== |    |
| label | FUNCTION [(parameter list)] |
| local data | |
| CODE | |
| statements | |
| RETURN(value) |
FUNCTION is a statement which once defined a PROCEDURE prototyped to return a value (referred to as a function in some other programming languages). The FUNCTION keyword has been replaced by the PROCEDURE statement and is now a synonym for PROCEDURE in all cases.
Example:
PROGRAM
MAP
FullName FUNCTION(STRING Last,STRING First,<;STRING Init>),STRING
!Function prototype with parameters
DayString FUNCTION,STRING !Function prototype without parameters
END
TodayString STRING(3)
CODE
TodayString = DayString() !Function call without parameters
! the () is required for a function
FullName FUNCTION(STRING Last, STRING First,STRING Init) !Full name function
CODE !Begin executable code section
IF OMITTED(3) OR Init = !If no middle initial
RETURN(CLIP(First) & & Last) ! return full name
ELSE !Otherwise
RETURN(CLIP(First) & & Init & . & Last) ! return full name
END
DayString FUNCTION !Day string function
ReturnString STRING(9),AUTO !Uninitialized local stack variable
CODE !Begin executable code section
RETURN(CHOOSE(TODAY()%7)+1,Sun,Mon,Tue,Wed,Thu,Fri,Sat))
See Also: