The REWIND statement positions a sequential or direct access file at the beginning of the file (the initial point). It takes one of the following forms:
Rules and Behavior
The unit number must refer to a file on disk or magnetic tape, and the file must be open for sequential, direct, or append access.
If a REWIND is done on a direct access file, the NEXTREC specifier is assigned a value of 1.
A REWIND statement must not be specified for a file that is open for keyed access.
If a file is already positioned at the initial point, a REWIND statement has no effect.
If a REWIND statement is specified for a unit that is not open, it has no effect.
The following statement repositions the file connected to I/O unit 3 to the beginning of the file:
Consider the following statement:
REWIND (UNIT=9, IOSTAT=IOS, ERR=10)
This statement positions the file connected to unit 9 at the beginning of the file. If an error occurs, control is transferred to the statement labeled 10, and a positive integer is stored in variable IOS.
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