Sather - Hello World

Hello World

class HELLO_WORLD is main is #OUT+"Hello World\n"; end; end;

A few remarks:

  • Class names are ALL CAPS; this is not only a convention but is enforced by the compiler.
  • The method called main is the entry point for execution. It may belong to any class, but if this is different from MAIN, it must be specified as a compiler option.
  • # is the constructor symbol, calling method create of the corresponding class; here it is used for instantiating the OUT class, which is actually stdout.
  • The + operator has been overloaded here to stand for stream append.
  • Operators such as + are syntactic sugar for conventionally named method calls: a + b stands for a.plus(b). The usual arithmetic precedence conventions are used to resolve the calling order of methods in complex formulae.
  • The program layout allows for pre- and post-conditions (not shown here), showing Sather's Eiffel lineage.

Read more about this topic:  Sather

Famous quotes containing the word world:

    “Once kick the world, and the world and you will live together at a reasonably good understanding.”
    —Jonathan Swift (1667–1745)

    “Some say the world will end in fire,
    Some say in ice.
    From what I’ve tasted of desire
    I hold with those who favor fire.
    But if it had to perish twice,
    I think I know enough of hate
    To say that for destruction ice
    Is also great
    And would suffice.”
    —Robert Frost (1874–1963)