A-M baby

Task/Hello-world-Standard-error/0DESCRIPTION

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+{{selection|Short Circuit|Console Program Basics}}A common practice in computing is to send error messages to a different output stream than [[User Output - text|normal text console messages]]. The normal messages print to what is called "standard output" or "standard out". The error messages print to "standard error". This separation can be used to redirect error messages to a different place than normal messages.
+
+Show how to print a message to standard error by printing "Goodbye, World!" on that stream.

Task/Hello-world-Standard-error/1META.yaml

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+---
+note: Basic language learning

Task/Hello-world-Standard-error/4DOS-Batch/hello-world-standard-error.4dos

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+echoerr Goodbye, World!

Task/Hello-world-Standard-error/ALGOL-68/hello-world-standard-error.alg

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+main:(
+  put(stand error, ("Goodbye, World!", new line))
+)

Task/Hello-world-Standard-error/ATS/hello-world-standard-error.ats

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+implement main () = fprint (stderr_ref, "Goodbye, World!\n")

Task/Hello-world-Standard-error/AWK/hello-world-standard-error-1.awk

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+BEGIN {
+  print "Goodbye, World!"| "cat 1>&2"
+}

Task/Hello-world-Standard-error/AWK/hello-world-standard-error-2.awk

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+BEGIN {
+  print "Goodbye, World!" > "/dev/stderr"
+}

Task/Hello-world-Standard-error/Ada/hello-world-standard-error.ada

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+with Ada.Text_IO;  use Ada.Text_IO;
+
+procedure Goodbye_World is
+begin
+   Put_Line (Standard_Error, "Goodbye, World!");
+end Goodbye_World;

Task/Hello-world-Standard-error/Argile/hello-world-standard-error-1.argile

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+use std
+eprint "Goodbye, World!"

Task/Hello-world-Standard-error/Argile/hello-world-standard-error-2.argile

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+use std
+eprintf "Goodbye, World!\n"

Task/Hello-world-Standard-error/Argile/hello-world-standard-error-3.argile

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+use std
+fprintf stderr "Goodbye, World!\n"

Task/Hello-world-Standard-error/AutoHotkey/hello-world-standard-error-1.ahk

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+; c:\>  autohotkey.exe stderr.ahk 2> error.txt
+FileAppend, Goodbye`, World!, stderr   ; requires AutoHotkey_N

Task/Hello-world-Standard-error/AutoHotkey/hello-world-standard-error-2.ahk

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+FileAppend, Goodbye`, World!, *

Task/Hello-world-Standard-error/AutoIt/hello-world-standard-error.autoit

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+ConsoleWriteError("Goodbye, World!" & @CRLF)

Task/Hello-world-Standard-error/BASIC/hello-world-standard-error.bas

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+10 PRINT #1;"Goodbye, World!"
+20 PAUSE 5: REM allow time for the user to see the error message

Task/Hello-world-Standard-error/BBC-BASIC/hello-world-standard-error.bbc

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+      STD_ERROR_HANDLE = -12
+      SYS "GetStdHandle", STD_ERROR_HANDLE TO @hfile%(1)
+      PRINT #13, "Goodbye, World!"
+      QUIT

Task/Hello-world-Standard-error/Batch-File/hello-world-standard-error.bat

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+1>&2 echo Goodbye, World!

Task/Hello-world-Standard-error/C++/hello-world-standard-error.cpp

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+#include <iostream>
+
+using std::cerr;
+using std::endl;
+
+int main () {
+  cerr << "Goodbye, World!" << endl;
+
+  return cerr.bad();
+}

Task/Hello-world-Standard-error/C/hello-world-standard-error.c

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+#include <stdio.h>
+
+int main()
+{
+	fprintf(stderr, "Goodbye, ");
+	fputs("World!\n", stderr);
+
+	return 0;
+}

Task/Hello-world-Standard-error/CMake/hello-world-standard-error.cmake

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+message("Goodbye, World!")

Task/Hello-world-Standard-error/COBOL/hello-world-standard-error.cobol

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+	program-id. ehello.
+	procedure division.
+		display "Goodbye, world!"  upon syserr.
+		stop run.

Task/Hello-world-Standard-error/Clojure/hello-world-standard-error.clj

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+(binding [*out* *err*]
+  (println "Goodbye, world!"))

Task/Hello-world-Standard-error/CoffeeScript/hello-world-standard-error.coffee

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+console.warn "Goodbye, World!"

Task/Hello-world-Standard-error/Common-Lisp/hello-world-standard-error.lisp

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+(format *error-output* "Goodbye, world!~%")

Task/Hello-world-Standard-error/D/hello-world-standard-error-1.d

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+import std.stdio;
+
+void main () {
+    stderr.writeln("Goodbye, World!");
+}

Task/Hello-world-Standard-error/D/hello-world-standard-error-2.d

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+import tango.io.Stdout;
+
+void main () {
+    Stderr("Goodbye, World!").newline;
+}

Task/Hello-world-Standard-error/Delphi/hello-world-standard-error.delphi

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+program Project1;
+
+{$APPTYPE CONSOLE}
+
+begin
+  WriteLn(ErrOutput, 'Goodbye, World!');
+end.

Task/Hello-world-Standard-error/Dylan.NET/hello-world-standard-error-1.net

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+Console::get_Error()::WriteLine("Goodbye World!")

Task/Hello-world-Standard-error/Dylan.NET/hello-world-standard-error-2.net

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+//compile using the new dylan.NET v, 11.2.8.2 or later
+//use mono to run the compiler
+#refstdasm mscorlib.dll
+
+import System
+
+assembly stderrex exe
+ver 1.1.0.0
+
+class public auto ansi Module1
+
+   method public static void main()
+      Console::get_Error()::WriteLine("Goodbye World!")
+   end method
+
+end class

Task/Hello-world-Standard-error/E/hello-world-standard-error.e

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+stderr.println("Goodbye, World!")

Task/Hello-world-Standard-error/Erlang/hello-world-standard-error.erl

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+io:put_chars(standard_error, "Goodbye, World!\n").

Task/Hello-world-Standard-error/Euphoria/hello-world-standard-error.euphoria

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+puts(2,"Goodbye, world!\n") -- 2 means output to 'standard error'

Task/Hello-world-Standard-error/Factor/hello-world-standard-error.factor

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+error-stream get [ "Goodbye, World! bbl, crashing" print flush ] with-output-stream*

Task/Hello-world-Standard-error/Fantom/hello-world-standard-error.fantom

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+class Main
+{
+  public static Void main ()
+  {
+    Env.cur.err.printLine ("Goodbye, World!")
+  }
+}

Task/Hello-world-Standard-error/Forth/hello-world-standard-error.fth

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+outfile-id
+  stderr to outfile-id
+  ." Goodbye, World!" cr
+to outfile-id

Task/Hello-world-Standard-error/Fortran/hello-world-standard-error.f

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+program StdErr
+  ! Fortran 2003
+  use iso_fortran_env
+
+  ! in case there's no module iso_fortran_env ...
+  !integer, parameter :: ERROR_UNIT = 0
+
+  write (ERROR_UNIT, *) "Goodbye, World!"
+end program StdErr

Task/Hello-world-Standard-error/Go/hello-world-standard-error-1.go

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+package main
+func main() { println("Goodbye, World!") }

Task/Hello-world-Standard-error/Go/hello-world-standard-error-2.go

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+package main
+import ("fmt"; "os")
+func main() { fmt.Fprintln(os.Stderr, "Goodbye, World!") }

Task/Hello-world-Standard-error/Groovy/hello-world-standard-error.groovy

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+System.err.println("Goodbye, World!")

Task/Hello-world-Standard-error/Haskell/hello-world-standard-error.hs

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+import System.IO
+main = hPutStrLn stderr "Goodbye, World!"

Task/Hello-world-Standard-error/Icon/hello-world-standard-error.icon

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+procedure main()
+  write(&errout, "Goodbye World" )
+end

Task/Hello-world-Standard-error/J/hello-world-standard-error.j

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+stderr =: 1!:2&4
+stderr 'Goodbye, World!'

Task/Hello-world-Standard-error/Java/hello-world-standard-error.java

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+public class Err{
+   public static void main(String[] args){
+      System.err.println("Goodbye, World!");
+   }
+}

Task/Hello-world-Standard-error/JavaScript/hello-world-standard-error-1.js

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+WScript.StdErr.WriteLine("Goodbye, World!");

Task/Hello-world-Standard-error/JavaScript/hello-world-standard-error-2.js

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+console.warn("Goodbye, World!")

Task/Hello-world-Standard-error/Lua/hello-world-standard-error.lua

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+io.stderr:write("Goodbye, World!\n")

Task/Hello-world-Standard-error/MATLAB/hello-world-standard-error.m

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+error 'Goodbye, World!'

Task/Hello-world-Standard-error/ML-I/hello-world-standard-error.ml

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+MCSET S4=1
+MCNOTE Goodbye, World!

Task/Hello-world-Standard-error/Mathematica/hello-world-standard-error.mathematica

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+Write[Streams["stderr"], "Goodbye, World!"]

Task/Hello-world-Standard-error/Mercury/hello-world-standard-error.mercury

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+:- module hello_error.
+:- interface.
+
+:- import_module io.
+:- pred main(io::di, io::uo) is det.
+
+:- implementation.
+
+main(!IO) :-
+    io.stderr_stream(Stderr, !IO),
+    io.write_string(Stderr, "Goodbye, World!\n", !IO).

Task/Hello-world-Standard-error/Metafont/hello-world-standard-error.metafont

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+errmessage "Error";
+message "...going on..."; % if the user decides to go on and not to stop
+                          % the program because of the error.

Task/Hello-world-Standard-error/Modula-2/hello-world-standard-error.mod2

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+MODULE HelloErr;
+IMPORT StdError;
+
+BEGIN
+  StdError.WriteString('Goodbye, World!');
+  StdError.WriteLn
+END HelloErr.

Task/Hello-world-Standard-error/Modula-3/hello-world-standard-error.mod3

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+MODULE Stderr EXPORTS Main;
+
+IMPORT Wr, Stdio;
+
+BEGIN
+  Wr.PutText(Stdio.stderr, "Goodbye, World!\n");
+END Stderr.

Task/Hello-world-Standard-error/PHP/hello-world-standard-error-1.php

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+fprintf(STDERR, "Goodbye, World!\n");

Task/Hello-world-Standard-error/PHP/hello-world-standard-error-2.php

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+file_put_contents("php://stderr","Hello World!\n");

Task/Hello-world-Standard-error/Perl/hello-world-standard-error-1.pl

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+warn "Goodbye, World!\n";

Task/Hello-world-Standard-error/Perl/hello-world-standard-error-2.pl

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+print STDERR "Goodbye, World!\n";

Task/Hello-world-Standard-error/PicoLisp/hello-world-standard-error.l

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+(out 2 (prinl "Goodbye, World!"))

Task/Hello-world-Standard-error/Python/hello-world-standard-error-1.py

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+import sys
+
+print >> sys.stderr, "Goodbye, World!"

Task/Hello-world-Standard-error/Python/hello-world-standard-error-2.py

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+import sys
+
+print("Goodbye, World!", file=sys.stderr)

Task/Hello-world-Standard-error/Python/hello-world-standard-error-3.py

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+import sys
+
+sys.stderr.write("Goodbye, World!\n")

Task/Hello-world-Standard-error/R/hello-world-standard-error.r

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+cat("Goodbye, World!", file=stderr())

Task/Hello-world-Standard-error/REXX/hello-world-standard-error-1.rexx

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+say 'Goodbye, World!'

Task/Hello-world-Standard-error/REXX/hello-world-standard-error-2.rexx

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+say "Goodbye, World!"

Task/Hello-world-Standard-error/REXX/hello-world-standard-error-3.rexx

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+call lineout ,"Goodbye, World!"

Task/Hello-world-Standard-error/REXX/hello-world-standard-error-4.rexx

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+call charout ,"Goodbye, World!"

Task/Hello-world-Standard-error/Racket/hello-world-standard-error.rkt

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+(eprintf "Goodbye, World!\n")

Task/Hello-world-Standard-error/Ruby/hello-world-standard-error-1.rb

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+$stderr.puts "Goodbye, World!"

Task/Hello-world-Standard-error/Ruby/hello-world-standard-error-2.rb

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+warn "Goodbye, World!"

Task/Hello-world-Standard-error/Sather/hello-world-standard-error.sa

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+class MAIN is
+  main is
+    #ERR + "Hello World!\n";
+  end;
+end;

Task/Hello-world-Standard-error/Scala/hello-world-standard-error-1.scala

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+System.err.println("Goodbye, World!")

Task/Hello-world-Standard-error/Scala/hello-world-standard-error-2.scala

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+Console.err.println("Goodbye, World!")

Task/Hello-world-Standard-error/Scheme/hello-world-standard-error.ss

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+(error "Goodbye, World!")

Task/Hello-world-Standard-error/Tcl/hello-world-standard-error.tcl

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+puts stderr "Goodbye, World!"