View Source: HelloWorld - Waikato Linux Users Group

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This is the default introductory program to a new ProgrammingLanguage. It simply prints the text “Hello World” and a newline.

HelloWorld is not really meant as a sample program, though. What you learn from creating a Hello World program is how to use the language tools: it's a first exercise in entering, compiling and running a program on a paticular system, and it might make you go find the documentation on the I/O library in some cases. In many very high level languages, it looks exactly the same.

As a demonstration of the feel of a language, PPR:WardNumber is a much better problem. [99 Bottles of Beer on the Wall | http://99-bottles-of-beer.ls-la.net/] can also be adequate.

Some examples of HelloWorld in different ProgrammingLanguage~s:

[BASIC]::
  <verbatim>
  PRINT "Hello World\n"
  </verbatim>

[C]::
  <verbatim>
  #include <stdio.h>
  int main(int argc, char **argv) {
      printf("Hello World\n");
      return 0;
  }
  </verbatim>

[C++]::
  <verbatim>
  #include <iostream>
  int main (int argc, char *argv[]) {
      std::cout << "Hello World" << std::endl;
      return 0;
  }
  </verbatim>

[COBOL]::
  ''I'm not sure how much of this is serious or facetious...''
  <verbatim>
  000100 IDENTIFICATION DIVISION.
  000200 PROGRAM-ID. HELLOWORLD.
  000300 DATE-WRITTEN. 02/05/96 21:04.
  000400* AUTHOR BRIAN COLLINS
  000500 ENVIRONMENT DIVISION.
  000600 CONFIGURATION SECTION.
  000700 SOURCE-COMPUTER. RM-COBOL.
  000800 OBJECT-COMPUTER. RM-COBOL.
  000900
  001000 DATA DIVISION.
  001100 FILE SECTION.
  001200
  100000 PROCEDURE DIVISION.
  100100
  100200 MAIN-LOGIC SECTION.
  100300 BEGIN.
  100400 DISPLAY " " LINE 1 POSITION 1 ERASE EOS.
  100500 DISPLAY "HELLO, WORLD." LINE 15 POSITION 10.
  100600 STOP RUN.
  100700 MAIN-LOGIC-EXIT.
  100800 EXIT.
  </verbatim>

[Java]
  <verbatim>
  public class HelloWorld {
      public static void main(String[] args) {
          System.out.println("Hello World");
      }
  }
  </verbatim>

[Linux] [x86] AssemblyLanguage::
  <verbatim>
  .data
  .align 4
  message::
    .string    "Hello World\n"
  message_len = . - message

  .text
  .align 4
  .globl _start
  _start::
     movl $0x4, %eax
     movl $0x1, %ebx
     movl $message, %ecx
     movl $message_len, %edx
     int  $0x80
     movl $0x1, %eax
     xorl %ebx, %ebx
     int  $0x80
  </verbatim>

[Perl]::
  <verbatim>
  print join('', pack("V4", (0x6c6c6548,0x6f77206f,0xa646c72)));
  </verbatim>

  ''Sorry, someone is being facetious. Of course, it's:''

  <verbatim>
  print "Hello World\n";
  </verbatim>

[Python]::
  <verbatim>
  print "Hello World"
  </verbatim>

__UserRPL__ (for the HP48 Calculator)::
  <verbatim>
  << "Hello World" MSGBOX >>
  </verbatim>

[PHP]::
  <verbatim>
  <?php
  echo("Hello World\n");
  ?>
  </verbatim>

And the list could go on and on.

See also:
* [Hello, World Page! | http://www2.latech.edu/~acm/HelloWorld.shtml], a very comprehensive collection of HelloWorld programs in many ProgrammingLanguage~s
* PolyGlot
4 pages link to HelloWorld:
Last edited on Wednesday, April 4, 2007 8:32:59 am by AristotlePagaltzis
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