Hello World!

General
The Hello World! is a small program and traditionally the first for newcomers.

Interactive
If you like to typ it into the interactive environment, you have to start it with

and then you type in:

and you will get:

If you have Python 2.X, you type:

In File
The classical 'Hello World!' is in Python 2.X just like this:

If you have Python 3.X, you must type in: