Marks the beginning of an input stream for a command or program.
   The DECK command is required in command procedures when the first
   nonblank character in any data record in the stream is a dollar
   sign ($).

   Can be used only after a request to execute a command or program
   that requires input data.

   Format

     DECK

Additional information available:

QUALIFIER

Additional information available:

/DOLLARS

      /DOLLARS[=string]

   Sets the EOF indicator to the specified string of 1 to 15
   characters. Specify a string if the input data contains one or
   more records beginning with the string $EOD. Enclose the string in
   quotation marks (" ")  if it contains literal lowercase letters,
   multiple blanks, or tabs. If you do not specify /DOLLARS, or if
   you specify /DOLLARS without specifying a string, you must use the
   EOD command to signal the end-of-file (EOF).