The variable from which the data should be output. May be an expression. The length of array and the records on the tape may range from 14 to 65,235 bytes.unit
A number between 0 and 9 specifying the magnetic tape unit to rewind. (Do not confuse this parameter with file logical unit numbers.)byte_reverse
(optional) If present, causes the even and odd numbered bytes to be swapped on output, regardless of the type of data or variables. This facilitates writing tapes compatible with IBM machines.
