The field *INxx is a predefined one-position character field where xx represents any one of the RPG IV indicators except 1P or MR.
The specification of the *INxx field or the *IN(n) fixed-index array element (where n = 1 - 99) as a field in an input record, as a result field, or as factor 1 in a PARM operation defines the corresponding indicator for use in the program.
You can specify the field *INxx wherever a one-position character field is valid except that *INxx cannot be specified as a subfield in a data structure, as the result field of a PARM operation, or in a SORTA operation.