hello world

hello world
 interj.

   1. The canonical minimal test message in the C/Unix universe.

   2. Any of the minimal programs that emit this message (a
   representative sample in various languages can be found at
   http://www.latech.edu/~acm/helloworld/). Traditionally, the first
   program a C coder is supposed to write in a new environment is one
   that just prints "hello, world" to standard output (and indeed it is
   the first example program in {K&R}). Environments that generate an
   unreasonably large executable for this trivial test or which require a
   {hairy} compiler-linker invocation to generate it are considered to
   {lose} (see {X}).

   3. Greeting uttered by a hacker making an entrance or requesting
   information from anyone present. "Hello, world! Is the LAN back up
   yet?"