READ

 Transfers data from external or internal units to internal storage.

 The meanings of the symbolic abbreviations used to represent the
 parameters in the READ statement syntax are as follows:

    extu     Is the logical unit or internal file optionally 
    or       prefaced by UNIT=.  UNIT= is required if unit is 
    intu     not the first element in the clist.

    fmt      Specifies whether formatting is to be used for 
             data editing, and if it is, the format specification 
             or an asterisk (*) to indicate list-directed formatting. 
             The "fmt" is optionally prefaced by FMT=, if "fmt" is 
             the second parameter in the clist and the first parameter
             is a logical or internal unit specifier without the 
             optional keyword UNIT=.

    nml      Is the namelist group specification for namelist I/O. 
             Optionally prefaced by NML=.  NML= is required
             if namelist is not the second I/O specifier.
    
    rec      Is the cell number of a record to be accessed directly.
             Optionally prefaced by REC= or by an apostrophe (').
    
    iostat   Is the name of a variable to contain the completion 
             status of the I/O operation. Optionally prefaced 
             by IOSTAT=.

    err      Is the label of a statement to which control is 
             transferred in the event of an error. Optionally 
             prefaced by ERR=.

    end      Is the label of a statement to which control is 
             transferred in the event of an end-of-file. 
             Optionally prefaced by END=.

    eor      Is the label of a statement to which control is 
             transferred in the event of an end-of-record. 
             Optionally prefaced by EOR=.  This can only
             be specified for nonadvancing READs.

    adv      Specifies advancing (ADVANCE='YES') or nonadvancing 
             input (ADVANCE='NO').  The default is 'YES'.

    size     Specifies character count (SIZE=int). It can
             only be indicated for nonadvancing READs.

    keyspec  Specifies the key of field value of a record to 
             be accessed.  Optionally prefaced by KEY=, KEYEQ=, 
             KEYGE=, KEYGT=, KEYNXT, KEYNXTNE, KEYLT, or KEYLE.

    keyid    Specifies the key field index that is to be searched 
             for the specified key field value. Optionally in-
             cluded with keyspec and optionally prefaced by KEYID=.

    iolist   Are the names of the variables, arrays, array 
             elements, or character substrings from which or 
             to which data will be transferred.  Optionally 
             an implied-DO list.

 The control-list parameters are "extu" (or "intu"), "fmt", "nml",
 "rec", "iostat", "err", "end", "adv", "size", "keyspec", and
 "keyid".  The I/O list parameter is "iolist".

Additional information available:

Sequential      Direct          Indexed         Internal