Category:Elena: Difference between revisions

To create a simple console program we have to declare the **program** symbol in the project root namespace:

Everything in ELENA is an object. To interact with it we have to send a message. The simplest (*generic*, i.e. without an explicit signature) message consists of *an action* and a *parameter list*.

The statement should be terminated by a dot (*ELENA is inspired by Smalltalk and uses its syntax notations*).

In our example the action is ~writeLine~ and the parameter list consists of a single literal constant. The message target is ~console~ object (implementing input / output operations with a program console).

We may read a user input by sending **readLine** message without parameters:

_ConsoleConsole::write_write method is similar to _writeLine_writeLine except that it writes to the output screen without a new line character.