<value> specifies the unit number. The keyword and equals sign are optional, if this is the first item in the list of specifiers.
FMT=<string, label or *>
Specifies the format in which the data will be read. The keyword is optional if this is the second item in the list of specifiers.
<variable> will contain zero if the operation was successful, otherwise a positive value to indicate an error, -1 to indicate EOF or -2 to indicate EOR.
<label> specifies a label to go to in the event of an error.
<label> specifies a label to go to on end of file.
<string> should be set to 'NO' for non-advancing input, 'YES' or absent for advancing input.
<variable> will contain the number of characters actually read (non-advancing only).
<label> specifies a label to go to on end of record (non-advancing).