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Hello World ProgramA "hello world" program is a computer program that prints out "Hello, world!" on a display device. It is used in many introductory tutorials for teaching a programming language and many students use it as their first programming experience in a language. Such a program is typically one of the simplest programs possible in a computer language. Some are surprisingly complex, especially in some graphical user interface (GUI) contexts. Some others are very simple, however, especially those which rely heavily on a particular command line interpreter ("shell") to perform the actual output. In many embedded systems, the text may be sent to a one or two-line LCD display (and in yet other systems, a simple LED being turned on may substitute for "Hello world!"). A "hello world" program can be a useful sanity test to make sure that a language's compiler, development environment, and run-time environment are correctly installed. Configuring a complete programming toolchain from scratch to the point where even trivial programs can be compiled and run may involve substantial amounts of work. For this reason, a simple program is used first when testing a new tool chain. While small test programs existed since the development of programmable computers, the tradition of using the phrase "Hello world!" as the test message was influenced by an example program in the book The C Programming Language, by Brian Kernighan and Dennis Ritchie, published in 1978. The example program from that book prints "hello, world" (i.e., no capital letters, no exclamation sign; those have entered the tradition later). The book had inherited the program from a 1974 Bell Laboratories internal memorandum by Kernighan —Programming in C: A Tutorial— which shows the first known version of the program: main( ) { printf("hello, world"); } However, the first known instance of the usage of the words "hello" and "world" together in computer literature is in A Tutorial Introduction to the Language B, by Brian Kernighan, 1973. http://cm.bell-labs.com/cm/cs/who/dmr/bintro.html A collection of "hello world" programs written in various computer languages can serve as a very simple "Rosetta Stone" to assist in learning and comparing the languages. Keep in mind, however, that unless assembly language or similar very low-level (hardware-near) languages are involved, not much "computing" (calculation) is usually exhibited. Here are some examples in different languages:
WRITE "Hello World" with Ada.Text_IO; procedure Hello is begin Ada.Text_IO.Put_Line ("Hello, world!"); end Hello; For explanation see . PROC main() WriteF('Hello, World!') ENDPROC 'Hello World' Accumulator-only architecture: DEC PDP-8, PAL-III assembler See the example section of the PDP-8 article. First successful P/OS combinations: Intel 8080/Zilog Z80, CP/M, RMAC assembler bdos equ 0005H ; BDOS entry point start: mvi c,9 ; BDOS function: output string lxi d,msg$ ; address of msg call bdos ret ; return to CCP msg$: db 'Hello, world!$' end start Accumulator + index register machine: MOS Technology 6502, CBM KERNAL, ca65 assembler MSG: .ASCIIZ "Hello, world!" LDX #0 LDA MSG,X ; load initial char @LP: JSR $FFD2 ; chrout INX LDA MSG,X BNE @LP RTS See the example section of the Nova article. Expanded accumulator machine: Intel x86, DOS, TASM MODEL SMALL IDEAL STACK 100H DATASEG MSG DB 'Hello, world!', 13, '$' CODESEG MOV AX, @data MOV DS, AX MOV DX, OFFSET MSG MOV AH, 09H ; DOS: output ASCII$ string INT 21H MOV AX, 4C00H INT 21H END .data msg: .ascii "Hello, world!\n" len = . - msg .text .global _start _start: movl $len,%edx movl $msg,%ecx movl $1,%ebx movl $4,%eax int $0x80 movl $0,%ebx movl $1,%eax int $0x80 General-purpose fictional computer: MIX, MIXAL TERM EQU 19 console device no. (19 = typewriter) ORIG 1000 start address START OUT MSG(TERM) output data at address MSG HLT halt execution MSG ALF "HELLO" ALF " WORL" ALF "D " END START end of program General-purpose fictional computer: MMIX, MMIXAL Main GETA $255,string get the address of the string in register 255 TRAP 0,Fputs,StdOut put the string pointed to by register 255 to file StdOut string BYTE "Hello, world!",#a,0 string to be printed (#a is newline and 0 terminates the string) TRAP 0,Halt,0 end process General-purpose-register CISC: DEC PDP-11, RT-11, MACRO-11 .MCALL .REGDEF,.TTYOUT,.EXIT .REGDEF HELLO: MOV #MSG,R1 MOVB (R1),R0 LOOP: .TTYOUT MOVB +(R1),R0 BNE LOOP .EXIT MSG: .ASCIZ /HELLO, WORLD!/ .END HELLO CISC on advanced multiprocessing OS: DEC VAX, VMS, MACRO-32 .title hello .psect data, wrt, noexe chan: .blkw 1 iosb: .blkq 1 term: .ascid "SYS$OUTPUT" msg: .ascii "Hello, world!" len = . - msg .psect code, nowrt, exe .entry hello, ^m<> ; Establish a channel for terminal I/O $assign_s devnam=term, - chan=chan blbc r0, end ; Queue the I/O request $qiow_s chan=chan, - func=#io$_writevblk, - iosb=iosb, - p1=msg, - p2=#len ; Check the status and the IOSB status blbc r0, end movzwl iosb, r0 ; Return to operating system end: ret .end hello RISC processor: ARM, RISC OS, BBC BASIC's in-line assembler .program ADR R0,message SWI "OS_Write0" SWI "OS_Exit" .message DCS "Hello, world!" DCB 0 ALIGN or the even smaller version (from qUE); SWI"OS_WriteS":EQUS"Hello, world!":EQUB0:ALIGN:MOVPC,R14 BEGIN { print "Hello, world! how r u doing" } The following example works for any ANSI/ISO-compliant BASIC implementation, as well as most implementations built into or distributed with microcomputers in the 1970s and 1980s (usually some variant of Microsoft BASIC). 10 PRINT "Hello, world!" 20 END Such implementations of BASIC could also execute instructions in an immediate mode when line numbers are omitted. The following examples works without requiring a RUN instruction. PRINT "Hello, world!" ? "Hello, world!" Later implementations of BASIC allowed greater support for structured programming and did not require line numbers for source code. The following example works when RUN for the vast majority of modern BASICs. PRINT "Hello, world!" END Again the "End" statement is optional in many BASICs. On TI calculators of the TI-80 through TI-86 range: :Disp "HELLO, WORLD!" or :Output(1,1,"HELLO, WORLD!") Or simply :"HELLO, WORLD!" On TI-89/TI-92 calculators: :hellowld() :Prgm :Disp "Hello, world!" :EndPrgm sub main print "Hello, World" end sub To output to the debug console: Debug.Print "Hello, world!" To output a message box to the user: VBA.Interaction.MsgBox "Hello, world!" GET "LIBHDR" LET START () BE $( WRITES ("Hello, world!*N") $) %TITLE 'HELLO_WORLD' MODULE HELLO_WORLD (IDENT='V1.0', MAIN=HELLO_WORLD, ADDRESSING_MODE (EXTERNAL=GENERAL)) = BEGIN LIBRARY 'SYS$LIBRARY:STARLET'; EXTERNAL ROUTINE LIB$PUT_OUTPUT; GLOBAL ROUTINE HELLO_WORLD = BEGIN LIB$PUT_OUTPUT(%ASCID %STRING('Hello World!')) END; END ELUDOM print "Hello, world!" This program will work on the fx-9750 graphing calculator and compatibles. "HELLO WORLD"←' #include int main(void) { printf("Hello, world!\n"); return 0; } using System; class HelloWorldApp { public static void Main() { Console.WriteLine("Hello, world!"); } } #include int main() { std::cout << "Hello, world!" << std::endl; return 0; } #using using namespace System; int wmain() { Console::WriteLine("Hello, world!"); return 0; } Hello, world! PRINT "Hello, World!" .method public static void Main() cil managed { .entrypoint .maxstack 8 ldstr "Hello, world!" call void mscorlibSystem.Console::WriteLine(string) ret } module hello Start = "Hello, world" PROC 0 WRITE Hello, World! IDENTIFICATION DIVISION. PROGRAM-ID. HELLO-WORLD. ENVIRONMENT DIVISION. DATA DIVISION. PROCEDURE DIVISION. DISPLAY "Hello, world!". STOP RUN. (format t "Hello world!~%") or (write-line "Hello World!") import std.stdio; void main() { writefln("Hello, world!"); } $ write sys$output "Hello, world!" module: hello format-out("Hello, world!\n"); Ed and Ex (Ed extended) a hello world! . p or like so: echo -e 'a\nhello world!\n.\np'|ed echo -e 'a\nhello world!\n.\np'|ex class HELLO_WORLD creation make feature make is local io:BASIC_IO do !!io io.put_string("%N Hello, world!") end -- make end -- class HELLO_WORLD -module(hello). -export(hello_world/0). hello_world() -> io:fwrite("Hello, world!\n"). puts(1, "Hello, world!") type data = { first: string; second: string; } let myData = { first="Hello"; second="world"; } let _ = print_string myData.first; print_string " "; print_string myData.second; print_newline() -TYPE Hello World begin TOOL HelloWorld; includes Framework; HAS PROPERTY IsLibrary = FALSE; forward Hello; -- START CLASS DEFINITIONS class Hello inherits from Framework.Object has public method Init; has property shared=(allow=off, override=on); transactional=(allow=off, override=on); monitored=(allow=off, override=on); distributed=(allow=off, override=on); end class; -- END CLASS DEFINITIONS -- START METHOD DEFINITIONS ------------------------------------------------------------ method Hello.Init begin super.Init(); task.Part.LogMgr.PutLine('HelloWorld!'); end method; -- END METHOD DEFINITIONS HAS PROPERTY CompatibilityLevel = 0; ProjectType = APPLICATION; Restricted = FALSE; MultiThreaded = TRUE; Internal = FALSE; LibraryName = 'hellowor'; StartingMethod = (class = Hello, method = Init); end HelloWorld; ." Hello, world!" CR PROGRAM HELLO PRINT *, 'Hello, world!' END printlnworld!" See also GUI section. PUBLIC SUB Main() Print "Hello, world!" END In the draw event of some object: draw_text(x,y,"Hello World") Or to show a splash screen message: show_message("Hello World") module Main (main) where main = putStr "Hello World\n" or main = putStr "Hello World\n" program HelloWorld; functions { _main() { print_string("Hello, world!"); } } end (Handheld Hewlett-Packard RPN-based alphanumeric engineering calculators.) 01 LBLTHELLO 02 THELLO, WORLD 03 PROMPT HP-41 output put "Hello world" Hello, HyperCard World! print,"Hello world!" [ Main; print "Hello, world!^"; ]; "Hello world!" print or write("Hello world!\n") ON ENTER { "Hello, " "World!" & SAY } See also GUI section. public class Hello { public static void main(String[] args) { System.out.println("Hello, world!"); } } (disassembler output of javap -c Hello.class) public class Hello extends java.lang.Object { public Hello(); public static void main(java.lang.String[]); } Method Hello() 0 aload_0 1 invokespecial #1 4 return Method void main(java.lang.String[]) 0 getstatic #2 3 ldc #3 5 invokevirtual #4 8 return WriteLine "Hello, world!" print world! or pr World! In mswlogo only messagebox [Hi] [Hello World] print "Hello, world!" W "Hello, world!" print("Hello, world!")$ print("Hello, World!"); PrintWorld" disp('Hello World') max v2; #N vpatcher 10 59 610 459; #P message 33 93 63 196617 Hello world!; #P newex 33 73 45 196617 loadbang; #P newex 33 111 31 196617 print; #P connect 1 0 2 0; #P connect 2 0 0 0; #P pop; MODULE Hello; FROM Terminal2 IMPORT WriteLn; WriteString; BEGIN WriteString("Hello, world!"); WriteLn; END Hello; (with the standard command.com interpreter. The @ symbol is optional and prevents the system from repeating the command before executing it. The @ symbol must be omitted on versions of MS-DOS prior to 3.0.) @echo Hello, world! : main me @ "Hello, world!" notify ; WRITE "Hello, World!" END #include int main() { initscr(); printw("Hello, world!"); refresh(); getch(); endwin(); return 0; } MODULE Hello; IMPORT Oberon, Texts; VAR W: Texts.Writer; PROCEDURE World*; BEGIN Texts.WriteString(W, "Hello World!"); Texts.WriteLn(W); Texts.Append(Oberon.Log, W.buf) END World; BEGIN Texts.OpenWriter(W) END Hello. #import int main (int argc, const char * argv[]) { NSLog(@"Hello, World!"); return 0; } print_endline "Hello world!" See also GUI section. PROC hello: PRINT "Hello, World" ENDP (object-class request ^action) (startup (strategy MEA) (make request ^action hello) ) (rule hello (request ^action hello) --> (write |Hello World!| (crlf)) ) Program Hello; begin WriteLn('Hello, world!'); end. print "Hello, world!\n"; (This is the first example of Learning Perl.) or but this is more recommended int main() { write("Hello, world!\n"); return 0; } procedure print_hello_world as dbms_output.enable(1000000); dbms_output.put_line("Hello World!"); end print_hello_world; Test: proc options(main) reorder; put skip edit('Hello, world!') (a); end Test; 'Hello world' => #include "colors.inc" camera { location <3, 1, -10> look_at <3,0,0> } light_source { <500,500,-1000> White } text { ttf "timrom.ttf" "Hello world!" 1, 0 pigment { White } } println("Hello world!"); write('Hello world'),nl. print "Hello, world!" say "Hello, world!" See also GUI section. (On Hewlett-Packard HP-28, HP-48 and HP-49 series graphing calculators.) << CLLCD "Hello, World!" 1 DISP 0 WAIT DROP >> See also GUI section. puts "Hello, world!" data _null_; put 'Hello World!'; run; class HELLO_WORLD is main is #OUT+"Hello World\n"; end; end; object HelloWorld with Application { Console.println("Hello, world!"); } (display "Hello, world!") (newline) (note: requires at least one line of input) sed -ne '1s/.*/Hello, world!/p' 'Hello, World!' print. BEGIN OutText("Hello World!"); OutImage; END Transcript show: 'Hello, world!'; cr print "Hello, world!\n"; OUTPUT = "Hello, world!" END with Spark_IO; --# inherit Spark_IO; --# main_program; procedure Hello_World --# global in out Spark_IO.Outputs; --# derives Spark_IO.Outputs from Spark_IO.Outputs; is begin Spark_IO.Put_Line (Spark_IO.Standard_Output, "Hello, world!", 0); end Hello_World; OUTPUT = "Hello, world!" END CREATE TABLE message (text char(15)); INSERT INTO message (text) VALUES ('Hello, world!'); SELECT text FROM message; DROP TABLE message; or (e.g. Oracle dialect) SELECT 'Hello, world!' FROM dual; or (for Oracle's PL/SQL proprietary procedural language) BEGIN DBMS_OUTPUT.ENABLE(1000000); DBMS_OUTPUT.PUT_LINE('Hello World, from PL/SQL'); END; or (e.g. MySQL or PostgreSQL dialect) SELECT 'Hello, world!'; or (e.g. T-SQL dialect) PRINT 'Hello, world!' or (for KB-SQL dialect) select Null from DATA_DICTIONARY.SQL_QUERY FOOTER or HEADER or DETAIL or FINAL event write "Hello, world!" RACINE: HELLO_WORLD. NOTIONS: HELLO_WORLD : ecrire("Hello, world!"). #OUTPUT Hello, world! Tcl (Tool command language) See also GUI section. puts "Hello, world!" put "Hello, world!" Declare @Output varchar(16) Set @Output='Hello, world!' Select @Output or, simpler variations: Select 'Hello, world!' Print 'Hello, world!' echo 'Hello, world!' or printf 'Hello, world!\n' or for a curses interface: dialog --msgbox "Hello, world!" 0 0 Graphical user interfaces (GUIs)
trace ("hello, world!") display dialog "Hello, world!" Or to have the OS synthesize it and literally say "hello world!" (with no comma, as that would cause the synthesizer to pause) say "Hello world!" #import @interface hello : NSObject { } @end @implementation hello -(void)awakeFromNib { NSBeep(); // we don't need this but it's conventional to beep // when you show an alert NSRunAlertPanel(@"Message from your Computer", @"Hello, world!", @"Hi!", nil, nil); } @end ShowMessage("Hello, world!"); #include #include #include using namespace fltk; int main(int argc, char **argv) { Window *window = new Window(300, 180); window->begin(); Widget *box = new Widget(20, 40, 260, 100, "Hello, World!"); box->box(UP_BOX); box->labelfont(HELVETICA_BOLD_ITALIC); box->labelsize(36); box->labeltype(SHADOW_LABEL); window->end(); window->show(argc, argv); return run(); } See also TUI section. PUBLIC SUB Main() Message.Info("Hello, world!") END #include #include #include #include using namespace std; class HelloWorld : public Gtk::Window { public: HelloWorld(); virtual ~HelloWorld(); protected: Gtk::Button m_button; virtual void on_button_clicked(); }; HelloWorld::HelloWorld() : m_button("Hello, world!") { set_border_width(10); m_button.signal_clicked().connect(SigC::slot(*this, &HelloWorld::on_button_clicked)); add(m_button); m_button.show(); } HelloWorld::~HelloWorld() {} void HelloWorld::on_button_clicked() { cout << "Hello, world!" << endl; } int main (int argc, char *argv[]) { Gtk::Main kit(argc, argv); HelloWorld helloworld; Gtk::Main::run(helloworld); return 0; } using Gtk; using GtkSharp; using System; class Hello { static void Main() { Application.Init (); Window window = new Window ("helloworld"); window.Show(); Application.Run (); } } include gtk2/wrapper.e Info(NULL,"Hello","Hello World!") See also TUI section. import javax.swing.JOptionPane; public class Hello { public static void main(String[] args) { JOptionPane.showMessageDialog(null, "Hello, world!"); } } - Java applets work in conjunction with HTML files.
Hello World HelloWorld Program says: import java.applet.*; import java.awt.*; public class HelloWorld extends Applet { public void paint(Graphics g) { g.drawString("Hello, world!", 100, 50); } } - JavaScript (an implementation of ECMAScript) is a client-side scripting language used in HTML files. The following code can be placed in any HTML file:
Hello World Example - An easier method uses JavaScript implicitly, directly calling the reserved alert function. Cut and paste the following line inside the .... HTML tags.
Hello World Example - An even easier method involves using popular browsers' support for the virtual 'javascript' protocol to execute JavaScript code. Enter the following as an Internet address (usually by pasting into the address box):
javascript:alert('Hello, world!'); - There is an almost infinite number of ways to do it:
javascript:document.write('Hello, world!\n'); See also TUI section. (On Psion Series 3 and later compatible PDAs.) PROC guihello: ALERT("Hello, world!","","Exit") ENDP or PROC hello: dINIT "Window Title" dTEXT "","Hello World" dBUTTONS "OK",13 DIALOG ENDP #include #include #include #include class HelloWorld : public QWidget { Q_OBJECT public: HelloWorld(); virtual ~HelloWorld(); public slots: void handleButtonClicked(); QPushButton *mPushButton; }; HelloWorld::HelloWorld() : QWidget(), mPushButton(new QPushButton("Hello, World!", this)) { connect(mPushButton, SIGNAL(clicked()), this, SLOT(handleButtonClicked())); } HelloWorld::~HelloWorld() {} void HelloWorld::handleButtonClicked() { std::cout << "Hello, World!" << std::endl; } int main(int argc, char *argv[]) { QApplication app(argc, argv); HelloWorld helloWorld; app.setMainWidget(&helloWorld); helloWorld.show(); return app.exec(); } MsgBox "Hello, world!" See also TUI section. (On Hewlett-Packard HP-48G and HP-49G series calculators.) << "Hello, World!" MSGBOX >> Hello () TEXT "Hello, world!" import org.eclipse.swt.SWT; import org.eclipse.swt.layout.RowLayout; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Label; public class SWTHello { public static void main (String [] args) { Display display = new Display (); final Shell shell = new Shell(display); RowLayout layout = new RowLayout(); layout.justify = true; layout.pack = true; shell.setLayout(layout); shell.setText("Hello, World!"); Label label = new Label(shell, SWT.CENTER); label.setText("Hello, World!"); shell.pack(); shell.open (); while (!shell.isDisposed ()) { if (!display.readAndDispatch ()) display.sleep (); } display.dispose (); } } See also TUI section. label .l -text "Hello, world!" pack .l Sub Main() MsgBox "Hello, world!" End Sub #include LRESULT CALLBACK WindowProcedure(HWND, UINT, WPARAM, LPARAM); char szClassName[] = "MainWnd"; HINSTANCE hInstance; int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { HWND hwnd; MSG msg; WNDCLASSEX wincl; hInstance = hInst; wincl.cbSize = sizeof(WNDCLASSEX); wincl.cbClsExtra = 0; wincl.cbWndExtra = 0; wincl.style = 0; wincl.hInstance = hInstance; wincl.lpszClassName = szClassName; wincl.lpszMenuName = NULL; //No menu wincl.lpfnWndProc = WindowProcedure; wincl.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1); //Color of the window wincl.hIcon = LoadIcon(NULL, IDI_APPLICATION); //EXE icon wincl.hIconSm = LoadIcon(NULL, IDI_APPLICATION); //Small program icon wincl.hCursor = LoadCursor(NULL, IDC_ARROW); //Cursor if (!RegisterClassEx(&wincl)) return 0; hwnd = CreateWindowEx(0, //No extended window styles szClassName, //Class name "", //Window caption WS_OVERLAPPEDWINDOW & ~WS_MAXIMIZEBOX, CW_USEDEFAULT, CW_USEDEFAULT, //Let Windows decide the left and top //positions of the window 120, 50, //Width and height of the window, NULL, NULL, hInstance, NULL); //Make the window visible on the screen ShowWindow(hwnd, nCmdShow); //Run the message loop while (GetMessage(&msg, NULL, 0, 0)>0) { TranslateMessage(&msg); DispatchMessage(&msg); } return msg.wParam; } LRESULT CALLBACK WindowProcedure(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { PAINTSTRUCT ps; HDC hdc; switch (message) { case WM_PAINT: hdc = BeginPaint(hwnd, &ps); TextOut(hdc, 15, 3, "Hello, world!", 13); EndPaint(hwnd, &ps); break; case WM_DESTROY: PostQuitMessage(0); break; default: return DefWindowProc(hwnd, message, wParam, lParam); } return 0; } Or, much more simply: #include int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { MessageBox(NULL, "Hello, world!", "", MB_OK); return 0; } WScript.Echo "Hello, world!" See also TUI section. require 'wxruby' class HelloWorldApp < Wx::App def on_init ourFrame = Wx::Frame.new(nil, -1, "Hello, world!").show ourDialogBox = Wx::MessageDialog.new(ourFrame, "Hello, world!", "Information:", \ Wx::OK|Wx::ICON_INFORMATION).show_modal end end HelloWorldApp.new.main_loop Hello, world Esoteric programming languages See: Hello world program in esoteric languages Document formats The following sequence of characters, expressed in hexadecimal notation (with carriage return and newline characters at end of sequence): 48 65 6C 6C 6F 2C 20 77 6F 72 6C 64 21 0D 0A The following sequence of characters, expressed as binary numbers (with cr/nl as above, and the same ordering of bytes): 00--07: 01001000 01100101 01101100 01101100 01101111 00101100 00100000 01110111 08--0F: 01101111 01110010 01101100 01100100 00100001 00001101 00001010 DONTCARE* (* The DONTCARE marker fills in for byte #0F, i.e. #15, which comes after our string.) \documentclass{article} \begin{document} Hello, world! \end{document} (Using UTF-8 character set.) <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <title>Hello, world!</title> </head> <body> <p>Hello, world!</p> </body> </html> (simple) <html><body> <h1>Hello, world!<p> </body></html> <html> and <body>-tags are not necessary for informal testing, <h1> should end with </h1> or <p>. You could even use the following <pre>Hello, World!</pre> or simple write it as text without tags. HTML 4.01 Strict (full) (Using UTF-8 character set.) <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <title>Hello, world!</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body> <p>Hello, world!</p> </body> </html> (Using UTF-8 character set.) <?xml version="1.0" encoding="utf-8"> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output method="xml" encoding="utf-8" doctype-system="http://www.w3.org/TR/2000/REC-xhtml1-20000126/DTD/xhtml1-strict.dtd" doctype-pubilc="-//W3C//DTD XHTML 1.0 Strict//EN"/> <xsl:template match="/"> <html> <head> <title>Hello World</title> </head> <body> Hello World </body> </html> </xsl:template> </xsl:stylesheet> /Courier findfont 24 scalefont setfont 100 100 moveto (Hello world!) show showpage {\rtf1\ansi\deff0 {\fonttbl {\f0 Courier New;}} \f0\fs20 Hello, world! } \font\HW=cmr10 scaled 3000 \leftline{\HW Hello World} \bye See also External links
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