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fortran .HLP

Formatted

Formatted I/O statements contain explicit format specifiers that are used to control the translation of data from internal (binary) form within a program to external (readable character) form in the records, or vice versa.

Formatted I/O statements must have a format (FMT=) specified in the control list (clist). Additional "clist" elements are required depending on the type of access.

Formatted sequential READ:

READ (UNIT=u,FMT=f[,IOSTAT=ios][,ERR=err][,END=end]) [iolist] READ f [,iolist]

Formatted direct access READ:

READ (UNIT=u,REC=rec,FMT=f[,IOSTAT=ios][,ERR=err]) [iolist]

Formatted indexed READ:

READ (UNIT=u,FMT=f,KEY=k[,KEYID=n][,IOSTAT=ios][,ERR=err]) [iolist]

Formatted internal READ:

READ (UNIT=u,FMT=f[,IOSTAT=ios][,ERR=err][,END=end]) [iolist]

Formatted sequential WRITE:

WRITE (UNIT=u,FMT=f[,IOSTAT=ios][,ERR=err]) [iolist]

Formatted direct access WRITE:

WRITE (UNIT=u,REC=rec,FMT=f[,IOSTAT=ios][,ERR=err]) [iolist]

Formatted indexed WRITE:

WRITE (UNIT=u,FMT=f[,IOSTAT=ios][,ERR=err]) [iolist]

Formatted internal WRITE:

WRITE (UNIT=u,FMT=f[,IOSTAT=ios][,ERR=err]) [iolist]

Unformatted

Unformatted I/O statements do not contain format specifiers and therefore do not translate the data being transferred.

Unformatted I/O is especially appropriate where the output data will later be used as input. Unformatted I/O saves execution time by eliminating the data translation process, preserves greater precision in the external data, and usually conserves file storage space.

Unformatted I/O statements do not specify a format (FMT=) in the control list (clist). Other "clist" elements are required depending on the type of access.

Unformatted sequential READ:

READ (UNIT=u[,IOSTAT=ios][,ERR=err][,END=end]) [iolist]

Unformatted direct access READ:

READ (UNIT=u,REC=rec[,IOSTAT=ios][,ERR=err]) [iolist]

Unformatted indexed READ:

READ (UNIT=u,KEY=k[,KEYID=n][,IOSTAT=ios][,ERR=err]) [iolist]

Unformatted sequential WRITE:

WRITE (UNIT=u,[,IOSTAT=ios][,ERR=err]) [iolist]

Unformatted direct access WRITE:

WRITE (UNIT=u,REC=rec[,IOSTAT=ios][,ERR=err]) [iolist]

Unformatted indexed WRITE:

WRITE (UNIT=u[,IOSTAT=ios][,ERR=err]) [iolist]

List_Directed

List-directed I/O statements are similar to formatted statements in function, but control the translation of data through data types instead of explicit format specifiers.

List-directed I/O statements specify a format (FMT=) in the control list (clist). Other "clist" elements are required depending on the type of access.

List-directed sequential READ:

READ (UNIT=u,FMT=*[,IOSTAT=ios][,ERR=err][,END=end]) [iolist] READ * [,iolist]

List-directed internal READ

READ (UNIT=u,FMT=*[,IOSTAT=ios][,ERR=err][,END=end]) [iolist]

List-directed sequential WRITE

WRITE (UNIT=u,FMT=*[,IOSTAT=ios][,ERR=err]) [iolist]

List-directed internal WRITE

WRITE (UNIT=u,FMT=*[,IOSTAT=ios][,ERR=err]) [iolist]

Namelist

Namelist I/O statements are similar to formatted statements in function, but control the translation of data through data types instead of explicit format specifiers.

Namelist I/O statements do not specify a format (FMT=) in the control list (clist).

Namelist sequential READ:

READ (UNIT=u,NML=nml[,IOSTAT=ios][,ERR=err][,END=end]) READ n

Namelist sequential WRITE:

WRITE (UNIT=u,NML=nml[,IOSTAT=ios][,ERR=err])