Statements are the executable instructions performed by the
  program.  Statements produce values and control program flow.  A
  group of statements enclosed in braces makes up a block.

  Any valid expression or declaration terminated by a semicolon is
  considered a statement.  The statements that control program flow
  are described in further HELP frames.

  See also HELP CC LANGUAGE_TOPICS DECLARATION and HELP CC
  LANGUAGE_TOPICS PREPROCESSOR.