1GENERAL: print, error - print messages

Usage: print [<file>] <text> [<option>]
       error [<file>] <text> [<option>]

The statements "print" and "error" write the message <text> to standard 
output or to the given <file>. "error" also invokes the the error handler
(as set with the variable "erract") and is thus useful to print error 
messages from within a macro. If the <text> contains blanks, it has to
stand in double quotes. The following options are possible when writing 
to a file:
  append     append to an existing file (this is the default for an
             opened file)
  close      close the file after writing the <text>

See also: erract