Defines a command line argument. Unlike options, argument don't have names and are identified using an index. The first index is 0 (because we are in the computer world).
Interface defining a command-line interface (in other words a command such as 'run', 'ls'…). This interface is polyglot to ease reuse such as in Vert.x Shell.A command line interface has a name, and defines a set of options and arguments. Options are key-value pair such as
Models command line options. Options are values passed to a command line interface using -x or –x. Supported syntaxes depend on the parser.Short name is generally used with a single dash, while long name requires a double-dash.