WriteLn¶

Write variable to a text file or standard output and append newline.

Declaration¶

Source position: system.fpd line 73

procedure WriteLn(V1: Type1);

procedure WriteLn(V1: Type1; V2: type2);

procedure WriteLn(V1: Type1; V2: Type2; V3: Type3);

procedure WriteLn(var F: Text; V1: Type1);

procedure WriteLn(var F: Text; V1: Type1; V2: type2);

procedure WriteLn(var F: Text; V1: Type1; V2: Type2; V3: Type3);

Description¶

WriteLn does the same as Write for text files, and emits a Carriage Return - LineFeed character pair after that. If the parameter F is omitted, standard output is assumed. If no variables are specified, a newline character sequence is emitted, resulting in a new line in the file F.

Remark:

The newline character is determined by the slinebreak constant.

Remark:

When writing string variables, no codepage conversions are done. The string is copied as-is to the file descriptor. In particular, for console output, it is the programmer's responsibility to make sure that the codepage of the string matches the codepage of the console.

More details can be found in the Write description.

Errors¶

If an error occurs, a run-time error is generated. This behavior can be controlled with the {$I} switch.

Example¶

Program Example75;

{ Program to demonstrate the Write(ln) function. }

Var
  F : File of Longint;
  L : Longint;

begin
  Write ('This is on the first line ! '); { No CR/LF pair! }
  Writeln ('And this too...');
  Writeln ('But this is already on the second line...');
  Assign (f,'test.tmp');
  Rewrite (f);
  For L:=1 to 10 do
    write (F,L); { No writeln allowed here ! }
  Close (f);
end.

Name	Description
Write	Write variable to a text file or standard output.
Read	Read from a text file into variable.
Readln	Read from a text file into variable and goto next line.
Blockwrite	Write data from memory to an untyped file.
slinebreak	Alias for LineEnding.