FORTRAN 77 Language Reference

Format Identifier

f is a format identifier and can be:

See "Runtime Formats " for details on formats evaluated at runtime.

If the optional characters, FMT=, are omitted from the format specifier, then f must appear as the second argument for a formatted read; otherwise, it must not appear at all.

Unformatted data transfer from internal files and terminal files is not allowed, hence, f must be present for such files.

List-directed data transfer from direct-access and internal files is allowed; hence, f can be an asterisk for such files. @

If a file is connected for formatted I/O, unformatted data transfer is not allowed, and vice versa.