DelphiBasics
Output
Variable
Defines the standard output text file System unit
  var Output : TextFile;
Description
The Output variable is predefined by Delphi to refer to the standard text output file.
 
This is normally the console, but may be overriden to any file using the Assign statement.
 
Output is used in the text file Write, WriteLn and Seek routines. It may be omitted in these commands however, since it is the default file.
Related commands
$AppType Determines the application type : GUI or Console
Input Defines the standard input text file
Write Write data to a binary or text file
WriteLn Write a complete line of data to a text file
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Example code : Read and write to the console
program Project1;

{$AppType CONSOLE}

uses
  SysUtils;

var
  name : string;

begin
  // A console application has the console Input and Output
  // assigned and opened on our behalf.
  WriteLn(Output, 'Please enter your name');
  ReadLn(Input, name);

  // And we do not even have to refer to these file names
  WriteLn('Your name is '+name);
  WriteLn('');
  WriteLn('Press enter to exit');
  ReadLn(name);
end.
   Example console output :
     
   Please enter your name
   Joe Bloggs
   Your name is Joe Bloggs
     
   Press enter to exit
 
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